Biochemistry
Zhila Zareie; Alieh Eslampanah; shahriar saeidian
Abstract
The aim of the research is to determine the adequacy of dialysis in patients undergoing hemodialysis through the evaluation of serum Bun and Cr, before and after dialysis and investigate the biochemical effect of dialysis on kidney in Lar city. This research was descriptive-analytical and cross-sectional ...
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The aim of the research is to determine the adequacy of dialysis in patients undergoing hemodialysis through the evaluation of serum Bun and Cr, before and after dialysis and investigate the biochemical effect of dialysis on kidney in Lar city. This research was descriptive-analytical and cross-sectional on 135 patients undergoing dialysis. Data collection was done through the researcher's demographic questionnaire. Blood creatinine and urea levels were measured by Jaffe and enzymatic methods, respectively. Dialysis adequacy was calculated through KT/V and URR parameters. The data was analyzed using descriptive and inferential statistical tests in SPSS software and by Pair t-test. Most hemodialysis patients of these centers had KT/V less than 1.2. Also, 36.1% of the subjects had URR>65 and 47.5% had KT/V>1.2. A significant decrease in serum urea and creatinine after dialysis was observed. The comparison of the types of membranes in the amount of urea and creatinine clearance showed a difference between these membranes in correcting the amount of urea and creatinine, So, HD type was the most efficient and the R4 type was the least efficient. The S3 membrane has a higher filtration rate than others, which can be the reason for this difference. The average difference of alkaline phosphatase activity before and after dialysis with S3 membrane was more than other membranes, although this difference was not significant. BUN and creatinine showed a significant decrease after hemodialysis compared to before hemodialysis. The result showed that 36.1% had adequate dialysis; But in others, do not have adequate dialysis efficiency.
Biophysics
AbdolJabbar Shokri; Shahryar Saeedyan; Hamed Heidari; Aram Azizi; Zohre-Sima Gilani
Abstract
Breast cancer remains a significant global health concern, necessitating the development of innovative treatment approaches. Magnetic nanoparticles (MNPs) have emerged as a promising tool in cancer therapy due to their unique properties and controllable behavior under external magnetic fields. In this ...
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Breast cancer remains a significant global health concern, necessitating the development of innovative treatment approaches. Magnetic nanoparticles (MNPs) have emerged as a promising tool in cancer therapy due to their unique properties and controllable behavior under external magnetic fields. In this paper, a two-dimensional simulation model has been used to investigate the potential of magnetic nanoparticles for breast tumor treatment. The model considers factors such as the type and size of nanoparticles, the behavior of the particles in the presence of an applied magnetic field, and the effects of MNPs on tumor tissue. Additionally, the duration of time that nanoparticles are exposed to alternating electromagnetic fields was modeled using the finite element method and Comsol Multiphysics software package. The calculation results demonstrate that the extent of tumor and healthy tissue destruction depends on the type of nanoparticles. Furthermore, an increase in the diameter of nanoparticles leads to a decrease in the percentage of tumor tissue destruction. It is important to note that increasing the amount of heating only results in more destruction of healthy tissues, thus the most significant destruction occurred within 50 minutes.
Biochemistry
Shahriar Saeidian; Nabi Khalili Aghdam; Zahra Baghaei far; Seyedeh Saleheh Hashemi
Abstract
Bromelain is an aqueous extract of pineapple contains a mixture of thiol proteases and non-protease components. In this research, the method of implementing the research was applied and quantitative, and by conducting the MTT test, information was collected. The results showed by increasing the dose ...
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Bromelain is an aqueous extract of pineapple contains a mixture of thiol proteases and non-protease components. In this research, the method of implementing the research was applied and quantitative, and by conducting the MTT test, information was collected. The results showed by increasing the dose of carbon nanotubes from 1 mg/L to 5 mg/L, the absorption efficiency increases significantly and the absorption capacity decreases and by increasing the initial concentration of Anahil drug from 50 mg/L to 300 mg/L in the dose of carbon nanotubes. No g 1/L the absorption capacity increased from 41.6 mg/g to 162.2 mg/g and in contrast the absorption efficiency decreased from 83.2 percent to 54.067 percent. The parameters of the adsorption equilibrium isotherms showed that the adsorption behavior of Anahil on carbon nanotubes follows the Freundlich model more than the Langmuir model. Also, the values obtained for parameter n in the Freundlich model for both temperatures were higher than 2, indicating the favorable adsorption of Anahil on carbon nanotubes. The results obtained from the MTT test showed that the drug Anahil in high concentrations (100 micrograms per liter) has a very strong lethal effect. It was also shown that the lethal effect of Anahil drug was more at the beginning and decreases with the passage of time. But in the case of the new drug synthesized using the introduction of the Anahil drug to the surface of carbon nanotubes, the lethality rate becomes a constant value, which indicates the gradual release of the drug over time, which is desirable for effective cancer treatment.
Mokhtar Fathi; Shahriyar Saeidian
Abstract
Regarding the role of arginine in vasodilatation and reduction of blood pressure and the possibility of replacing this amino acid with guanidinoacetic acid, a test was conducted with 400 chicks in 5 treatments (control, two levels of 0.5 and 1% arginine, and two levels of 0.15 And 0.3% Guanidininostech) ...
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Regarding the role of arginine in vasodilatation and reduction of blood pressure and the possibility of replacing this amino acid with guanidinoacetic acid, a test was conducted with 400 chicks in 5 treatments (control, two levels of 0.5 and 1% arginine, and two levels of 0.15 And 0.3% Guanidininostech) in four replications in a completely randomized design. Birds were subjected to a cold temperature program for induction of pulmonary hypertension syndrome. Blood parameters (RBC, hemoglobin, hematocrit and heterophile / lymphocyte), biochemical parameters (lactate, urea, uric acid and nitric oxide), enzymatic parameters (LDH, AST, ALT, CK) and antioxidant TAS, MDA, GPX, SOD) in plasma were measured at the end of the experiment (day 42). The results showed that supplementation of 1% arginine and 0.15% guanidinoacetic acid significantly decreased the heterophilic/ lymphocyte index, hematocrit, urea and uric acid, and increased nitric oxide (P <0.05). Treatment with 1% arginine and 0.15% guanidinoacetic acid reduced malondialdehyde and increased activity of superoxide dismutase and creatine kinase in plasma (P <0.05). The level of 1% of arginine also significantly increased the activity of glutathione peroxidase enzyme in the plasma. Other measured parameters were not significantly affected by experimental treatments (P> 0.05). In general, the results of this experiment showed that, given the lower price of guanidinoacetic acid compared to arginine, it is possible to effectively use 0.15% guanidinoacetic acid to replace arginine supplementation in preventing reduce stress.
Shahriar Saeidian; Zahra Baghaei Far; Zivar Parvanak; Mokhtar Fathi
Abstract
Breast cancer accounts for about 10% of all cancers in the world and accounts for 30% of all cancers in women. Therefore, its early detection will play an important role in its treatment. Because lncRNAs are expressed differently in cancerous tissues than in normal tissues, they increase the potential ...
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Breast cancer accounts for about 10% of all cancers in the world and accounts for 30% of all cancers in women. Therefore, its early detection will play an important role in its treatment. Because lncRNAs are expressed differently in cancerous tissues than in normal tissues, they increase the potential of these molecules as biomarkers for disease diagnosis. Also, changes in the expression of lncRNAs in patients with different types of cancer subtypes and different races intensify the importance of using these molecules as biomarkers for disease diagnosis. Therefore, the aim of this study was to investigate the expression of GAS5, NEAT1 and SRA lncRNAs in cancer specimens with cancer and in healthy individuals. In this study, from the tumor tissue of 22 patients with breast cancer and also 22 samples of healthy tissue from individuals under the direct supervision of a pathologist and according to clinical signs and laboratory findings were collected from hospitals in Isfahan. After RNA extraction from tumor and normal tissue, cDNA was fabricated according to RT-qPCR method. The lncRNA expression level of GAS5, NEAT1 and SRA genes was calculated by ∆∆CT method. The expression pattern was analyzed using Rest 2009 software as well as SPSS version 16. Real Time Reverse transcription-PCR results showed that the mean relative gene expression in tumor samples was significantly lower for GAS5 and NEAT1 lncRNAs than normal samples. But no expression change was observed for lncRNA SRA.
Somayeh Farahmand; Faezeh Fatemi; Marzieh Dehghan Shasaltaneh; Reza Haji Hosseini; Shahriar Saeedyan
Abstract
In Acidithiobacillus ferrooxidans, proteins, like CoxB, present in the electron transmission pathway. The structure of CoxB has two copper atoms (CuA, CuB). CuA plays an important role in electron transport. According to previous studies, the conversion of histidine to methionine in a similar protein ...
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In Acidithiobacillus ferrooxidans, proteins, like CoxB, present in the electron transmission pathway. The structure of CoxB has two copper atoms (CuA, CuB). CuA plays an important role in electron transport. According to previous studies, the conversion of histidine to methionine in a similar protein leads to an increase the stability of protein and to improve its function. Also, the binding of methionine to CuB in the wild protein structure is another reason for the selection of the H230M mutation in CuA site. Wild-type and H230M mutants are simulated in the presence of a bilayer membrane POPC using the gromacs version 5.1.4. The conformational changes of mutated protein were investigated by RMSD, RMSF, SASA, Rg, DSSP, density, MSD, thickness, PCA, ED, DCCM and FEL analysis. The results of the wild protein and H230M mutant analysis show that the bacteria still preserves its sustainability after mutation. It seems that the H230M mutation leads to the increase of the amount of electron reception that requires further studies in this regard. Molecular dynamic simulation and principal component analysis provide compelling evidence that this H230M mutation contributes to increase the stability of protein. Thus, this finding defines new approaches in structural properties, accurate survey, and probability improves the electron transfer.
Mokhtar Fathi; Shahriar Saeidian; Kobra Varmaghani
Abstract
A study was conducted to evaluate the antioxidant effects of selenium nanoparticles and sodium selenite on the antioxidant status, enzymatic activity and plasma lipid parameters of Pullet Chickswith 1050 birds in 7 treatments for 6 weeks. The treatments included three levels of 0.15, 0.3 and 0.6 (ppm) ...
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A study was conducted to evaluate the antioxidant effects of selenium nanoparticles and sodium selenite on the antioxidant status, enzymatic activity and plasma lipid parameters of Pullet Chickswith 1050 birds in 7 treatments for 6 weeks. The treatments included three levels of 0.15, 0.3 and 0.6 (ppm) sodium selenite and nano selenium. The antioxidant indices measured in the heart, liver and plasma include glutathione peroxidase (GPx), malondialdehyde (MDA) and total antioxidant capacity (TAS). Activity of alanine aminotransferase (ALT) enzymes, aspartate aminotransferase (AST) and alkaline phosphatase (ALP) were measured and lipid parameters including total triglyceride, total cholesterol and plasma LDL were determined. The results showed that sodium selenite and selenium nanoparticles significantly increased the activity of glutathione peroxidase and reduced levels of malondialdehyde in the plasma, heart and liver. The highest antioxidant effect was related to 0.6 ppm sodium selenium and 0.3 ppm selenium nanoparticles. There was no significant effect on total antioxidant capacity of plasma, heart and liver in experimental group (P<0.05) .There was no significant effect of experimental treatments on plasma enzyme activity (P<0.05). Sodium selenite and selenium nanoparticles at levels of 0.3 and 0.6 ppm significantly decreased triglyceride, cholesterol and LDL in the plasma of birds (P<0.05). Conclusion 0.3 ppm of selenium nanoparticles and 0.6 ppm of Sodium selenitecan be successfully used to improve the antioxidant status and reduce plasma bad fats.
Behjat Majidi; Mohsen Fathi Najafi; Shahriar Saeedian
Abstract
Brucella sp. Lumazine synthase, the enzyme involved in riboflavin biosynthesis composed of 10 identical subunits. According to extended applications of LS, it is necessary to set up a high yield expression and purification method for this enzyme.in current study, Lumazine synthase primary structure ...
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Brucella sp. Lumazine synthase, the enzyme involved in riboflavin biosynthesis composed of 10 identical subunits. According to extended applications of LS, it is necessary to set up a high yield expression and purification method for this enzyme.in current study, Lumazine synthase primary structure was achieved from NCBI database and it was expressed by pET28a in BL21 E. coli. The optimum concentrations of IPTG and Kanamycin was evaluated and applied for high yield expression of rBLS. For LPS removal and purification of protein, ammonium precipitation and ion exchange chromatography were performed and no background in ELISA (against Brucella) was observed. ELISA and Western Blotting techniques were applied for expression and purification confirming. For monitoring of purification, SDS-PAGE was applied. Purification of protein with DEAE sephadex (Diethylaminoethyl) resulted in a single band purified rBLS. The approach applied in this study can be used in generation a relatively pure rBLS as a valuable recombinant product in vaccine industries.
Shahriar Saeidian; Mahtab Ebrahimi; Aram Azizi
Abstract
Abstract
The most common diseases are neonatal jaundice at birth which leads to a yellowish skin of the infants and the white eye due to an increase in the amount of bilirubin in the baby's blood. Naturally, bilirubin passes through the liver and is excreted as bile from the intestine. Neonatal jaundice ...
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Abstract
The most common diseases are neonatal jaundice at birth which leads to a yellowish skin of the infants and the white eye due to an increase in the amount of bilirubin in the baby's blood. Naturally, bilirubin passes through the liver and is excreted as bile from the intestine. Neonatal jaundice occurs when bilirubin is produced earlier than the ability of the neonate liver to decompose and dispose of it. The aim of study was to determine the prevalence of neonatal jaundice and its risk factors.
In this descriptive study, 1000 neonates hospitalized to the Neonatal Department of Maryam Hospital of Karaj were examined by easy non-probability sampling. Total bilirubin, G6PD, hemoglobin, RH, blood group, as well as gender and delivery method. In this study, 36% of infants were affected by jaundice. The lack of G6PD activity in jaundice was 10.5%. The prevalence of preterm jaundice was ABO incompatibility, RH incompatibility and G6PD deficiency. The age and weight of the infant at the time of visit, the incidence of jaundice and the weight of the baby at 3 to 10 days in the groups were not significantly different. The mean of bilirubin in infants born with normal delivery was 3.8 and in cesarean section were 11.2. Amount of jaundice and its severity in neonates of cesarean section is higher. Total bilirubin in female neonates did not differ significantly with males. Part of the prevalence of jaundice was due to abnormality of ABO and RH and deficiency of the G6PD enzyme. The results show that other factors also affect jaundice. Approximately 80% of infants who lack the G6PD enzyme deficiency or incompatibility of the blood group showed that the level of bilirubin was much lower than that of normal infants.
Shahriar Saeidian
Volume 5, Issue 2 , December 2016, , Pages 1-11
Abstract
Kinetic properties of root of peroxidase of Gundelia tournefortii investigated at different pH, temperature and different inhibitors. Maximum activity of peroxidase achieved at pH 5.5-6 in according to type of substrate. Activity of peroxidase increased at constant concentration of H2O2 and different ...
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Kinetic properties of root of peroxidase of Gundelia tournefortii investigated at different pH, temperature and different inhibitors. Maximum activity of peroxidase achieved at pH 5.5-6 in according to type of substrate. Activity of peroxidase increased at constant concentration of H2O2 and different concentration of guaiacol, catechol and pyrogallol. The maximum activity in presence of 22mM of guaiacol was earned 2.4 Unit/mg.protein. At constant concentration of guaiacol and different concentration of H2O2, Vmax and Km were 2 Unit/mg.protein and 4 mM respectively. Activity decreased at high concentration of H2O2 so reached to 35% of Vmax at 40 mM. Catalytic efficiency of peroxidase in presence of constant concentrations of guaiacol and H2O2 calculated 0.5 and 0.5 Unit/mg protein mM-1 respectively. Stability of enzyme and maximum of activity was earned at 40 0C. Sodium cyanid and sodium azide showed inhibitory effect on activity with IC50 of 0.008 and 0.4 mM respectively. These results of inhibitors showed that inhibitory effect of Azid is 312 times of inhibitory effect of cyanide. Cyanid is competitive inhibitor of peroxidase in presence of catechol and pyrogallol and noncompetitive inhibitor of enzyme in presence of guaiacol, and Azide is noncompetitive inhibitor of peroxidase of root in gundelia tournefortii in presence of catechol and pyrogallol and uncompetitive inhibitor of enzyme in presence of guaiacol and kojic acid is uncompetitive inhibitor of peroxidase in presence of guaiacol and pyrogallol.
