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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Molecular and Clinical Microbiology
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Anticancer,extremophilic bacteria,L-glutaminase,L- Methioninas
- چکیده:
- چکیده انگلیسی: L Glutaminase and L- methioninase, therapeutic enzyme obtained from microbial source have been considered in the treatment of cancer. A total 20 water samples were obtained from the Yale Gonbad hot spring in Qazvin province, Iran. Production capabilities L Glutaminase and L- methioninase were tested on m9 and mcd plates, respectively. Enzyme-producing isolates were identified by conventional test and then confirmed using molecular methods. The PCR amplicons were directed for sequencing and Phylogenetic tree were drawn using Mega version 6 software. Twelve colonies were obtained from all tested samples. Three extratermophilic isolates showed L-glutaminase activity in M9 medium but only 1 isolates have L-methioninase activity in MCD medium. The phylogenetic tree drawn from the 16 S rRNA gene sequence showed were 100% similar to B. licheniformis and strains of S. epidermidis and L. sphaericus. In this study, Bacillus licheniformis was identified as a dominant and a native strain for the production of L-glutaminase and L-methioninase.
- انتشار مقاله: 17-05-1397
- نویسندگان: Mahnaz Farahmand,Elham Azizi,Mohammad Hassan Shahhosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Molecular and Clinical Microbiology
- نوع مقاله: Journal Article
- کلمات کلیدی: Candida albicans,Quantitative PCR,Virulence factors,Microwaves,Alpha-INT1 protein
- چکیده:
- چکیده انگلیسی: To date, registered users of mobile phone communication network exceeded from total numbers of the world population, while a little knowledge of the biological effects of, 900-1800 MHz microwave radiation, originating from the handsets or the base transceiver stations, have been released. The current study was designed for evaluation of 900-MHz radiation effects on Candida albicans proliferation, adherence and alpha-Int1 gene expression.
Candida albicans (ATCC:10231) grown in Yeast Peptone Dextrose (YPD) broth was distributed into five tubes (5 ml, 10^6 cells/ml) and exposed to 900 MHz GSM radiation for 6, 12, 18 and 24 hours, while the fifth tube was kept far from the radiation. Cell densities at 0, 6, 12, 18 and 24 hours were assayed (using turbidimetry in 600 nm). Equal cell densities (2.5 x 10^6 cells/ml, 200 ul) from exposed and unexposed yeasts were transferred into 96 well plates and incubated for 4 hours, in order to biofilm formation by the yeast. Yeast densities in biofilm network were assayed using the MTT method. Abundance of alpha-int1 mRNA was also estimated in the five yeast samples using q-RT-PCR method.
Microwave exposure led to increased proliferation rate and increased biofilm formation by the yeast and the effect was prominent in 18 hours exposed samples. Quantitative RT-PCR results showed significantly increased levels of the alpha-int1 mRNA in microwave exposed yeasts.
The significant increases in the yeast proliferation and biofilm formation after exposure to 900 MHz GSM radiation are partly mediated by changes in alpha-int1 protein expression.- انتشار مقاله: 26-07-1394
- نویسندگان: Ariyo Shahin-Jafari,Mansour Bayat,Mohammad Hassan Shahhosseini,Parviz Tajik,Shahla Roudbar-Mohammadi
- مشاهده