فهرست مطالب mohammad taher moradi

Breast cancer (BC) is known to be the most prevalent cancer among women. One-carbon metabolism (OCM) disturbance might play an important role in the etiology of BC. The present study aimed to investigate the thymidylate synthase (TYMS), 5-methyltetrahydrofolate-homocysteine methyltransferase (MTR), and methionine synthase reductase (MTRR) variants as good candidates for studying the role of genetic variants of folate metabolizing enzymes in the risk of BC.

The present case-control study consisted of 100 BC patients and 141 healthy females. The TYMS 2R/3R (rs34743033), MTR c.2756A>G (rs1805087), and MTRR c.66A>G (rs1801394) variants were detected by polymerase chain reaction (PCR), PCR-restriction fragment length polymorphism (RFLP), and a designed amplification-refractory mutation system (ARMS) method, respectively.

The 3R allele of TYMS enhanced the risk of BC by 2.84-fold (p <0.001). In the presence of TYMS 3R/3R, compared to TYMS 2R/3R, there was a trend toward enhancing the risk of metastasis by 4.15-fold (95% CI: 0.96-17.85, p =0.055). The frequencies of MTR c.2756A>G and MTRR c.66A>G variants were not significantly different among patients and controls.

We observed that the TYMS 3R is a risk allele for susceptibility to BC and this allele tends to increase the BC metastasis.

Long non-coding RNAs (lncRNAs) are newly introduced as tumor-related molecules. They are being considered as potential diagnostic and therapeutic targets in cancer studies. Here, we have assessed the importance of CYTOR (linc00152) as a biomarker for the detection of breast cancer in both tumoral tissue and plasma. The relative expression of breast cancer-associated CYTOR was measured in 20 tumoral and paired margin tissues, and moreover, in 80 plasma samples by real-time-polymerase chain reaction. In addition, plasma levels of CA 15-3 were measured using the ELISA test. The receiver operating characteristic curve (ROC) was applied for assessing the sensitivity and specificity of tested biomarkers. The results of the present study disclosed significantly increases in the CYTOR expression levels in tumor tissue with relative quantitation (RQ) equals to 5.15 (P<0.001) and in plasma (RQ =3.03, P<0.01) of breast cancer patients. The area under the ROC curve (AUC) of circulating CYTOR was 0.907 (95% CI: 0.842-0.972, P<0.001), while it was 0.868 (95% CI: 0.783–0.952, P<0.001) for CA 15-3. Based on these findings, we suggest lncRNA CYTOR as a new potential biomarker for breast cancer detection in both solid tumor tissue and plasma.

The DNA molecule has been known to be the cellular target for many cytotoxic anticancer agents for several decades. Understanding how drug molecules interact with DNA has become an active research area in the interface between chemistry, molecular biology and medicine. DNA extraction has been suggested as a main step affecting molecular DNA technology such as PCR and PCR-based methods. Therefore, researchers have used several modified protocols for efficient DNA extraction from whole blood. In this study, we focused on a fast and reliable protocol with inexpensive and non-poisonous reagents for DNA extraction from whole blood. Current method was optimized based on a combination of conventional salting-out and boiling methods. Also the quality and quantity of the extracted DNA were surveyed by gel electrophoresis and Nanodrop spectrophotometry methods, respectively. Results showed that high quantity and quality of isolated DNA by this method is enough to do hundreds of PCR-based reactions and also to be utilized in other DNA manipulation assay such as restriction digestion, drug- DNA interaction and methylation detection survey. In conclusion, we described a fast, low-cost, non-toxic and enzyme free protocol for high yield genomic DNA extraction from whole blood.

Background and The 50 KDa protein (50 µg) in carboxylic domain of the neurotoxin heavy chain (BoNT/A-Hc) recognizes surface receptors on target neurons and this fragment contains the principle protective antigenic determinants. Recently, this fragment has been used as a recombinant vaccine candidate for botulism. The study aimed to compare the evaluation of BoNT/A-Hc production in fed-batch (high cell density cultivation) and batch cultivation of recombinant Escherichia coli (E. coli.). In this research, growth of recombinant E. coli in batch culture was studied. In order to maximize protein expression, induction time and Isopropyl β-D-1-thiogalactopyranoside (IPTG) inducer concentration were optimized by the Taguchi statistical method. Then, fed-batch culture was applied to achieve high cell density cultivation. Finally, the recombinant protein expression level was determined. In optimized conditions, 62 and 486 mg/l of soluble recombinant BoNT/A-Hc were produced in batch and fed-batch cultivation. According to the results, high cell density in fed-batch cultivation is a very effective for improve of recombinant proteins productivity.