مجله سلول و بافت
سال هشتم شماره 1 (بهار 1396)

Aim: The aim of this study was investigation of Follistatin gene over-expression effects on cell cycle, myogenic and growth factor genes expression of ovine primary myoblast (OPM) cells in lab that was done using AAV serotype 2 virus (rAAV2) carrying Follistatin (FST).
Material and Obtained primary myoblasts cells from 60-day-old sheep fetuses were cultured in the growth and differentiation media. The optical density at 450 nm was measured as an indicator of proliferation in transfected cells with AAV serotype 2 (rAAV2) carrying Follistatin. Finally, Myogenic, Myo D, CDK2, Myf5, p57 and p21 genes expressions were measured using Real-Time qPCR.
The optical density (at 450 nm) was significantly increased in virus infected cells that shows Follistatin can increase proliferation. Follistatin proliferation significantly increased the expression of Akt1 and CDK2 genes and decreased the p21 expression gene under proliferation conditions. Real-Time results showed that the expression of myoincin, Myo D, Myf5, p57 and p21 genes increased under conditions of differentiation with Folistatin elevation.
The results showed that proliferation of Follistatin increased the myoblast cells proliferation by p21 gene expressing and increasing the differentiation of myoblast cells by increasing the myogenic genes expression.

Aim: The aim of this study was to investigate of cuprizone time-dependent effects on MAG, MOG, MBP, and PLP proteins and demyelination process.
The myelin degradation model was created with a five week diet containing 0.2% of cuprizone. The rats brain corpus callosum region was subjected to tissue and molecular evaluation at weeks 3, 4 and 5. At the end of the fifth week, behavioral studies were performed by open field test.
Results showed that the expression of myelin sheath proteins decreased time-dependently in comparison with the control group. Despite the overall reduction of these proteins in the third week, only PLP protein decreased significantly in this week comparing to control (P This research was the first time to study the main myelin proteins at the same time, and the results show that the best time for accurate molecular, tissue and behavioral reviews are fourth and fifth weeks.

Aim: The present study was designed to investigate the effects of chitosan/poly vinyl alcohol scaffold incorporated by NRBE (neonatal rat brain extract) on neuronal differentiation of P19 EC (embryonal carcinoma) stem cells.
Material and In order to induce neuronal phenotype, P19-derived embryonic carcinoma stem cells were cultured on a rat chitosan/poly (vinyl alcohol) scaffold with newborn rat brain extracts. To evaluate the survival potential, migration and differentiation of the three-dimensional culture cells, these cells were grafted to the developing central nervous system of the chick embryo. Finally, the transplanted cells were detected using specific staining and immunofluorescence methods.
Cresyl-Violet specific staining confirmed the neuronal phenotype of the transplantation cells. Also, the expression of specific neural protein, synaptophysin, was shown using the immunofluorescence process.
The results of this study showed that P19 embryonic carcinoma stem cells can be used as a source of pluripotent cells in transplantation studies in order to investigate cellular and molecular aspects of developmental and cellular differentiation.

Aim: The aim of the present study was to investigate the optimal expression of Hsp70 recombinant Rutilus FrissiKutum liver in E. coli.
Material and To evaluating of expression level of recombinant Hsp70, transformed E. coli were cultured in LB medium at 2, 4, 8, 12, 24, 36 and 48 hours, 20, 25, 30, 37 and 50 °C, extreme pH (5 and 9) and in present of heavy metals e.g. mercury, cobalt, iron, zinc and etc. Expression of recombinant Hsp70 protein was determined by SDS-PAGE 12% analysis of E. coli extracts followed by staining with Coomassie Blue.
Optimum expression of recombinant Hsp70 was obtained at 4 and 8 h, 37 °C and pH 5. Additionally, the maximum and minimum expression of this protein was achieved in present of manganese and cobalt respectively. The results further indicate that the survival of E. coli with Hsp70 was enhanced compared to the control cells.
All results reveal that transformed bacteria are able to survive against extreme environmental conditions compared to control sample, because of having recombinant Hsp70. This heat-shock protein protects vital proteins from denaturing by its chaperone property. So, growth condition described in this study can be used for optimizing production of recombinant Hsp70 in E. coli host.

Aim: Product of ODC1 gene is key enzyme in polyamines synthesis that in diverse cancers their content increases. In the present study the effects of root extract of licorice on the ODC1gene expression and cell viability of two human breast cancer cell lines (MCF-7 and MDA-MB-231) and non-cancer cell line (MCF-10A) were evaluated.
Material and The cell lines were subjected to increasing doses of the extract ranging from 0-200 µg ⁄ml. Cytotoxic effect was assessed using the MTT assay. Expression of ornithine decarboxylase 1 gene was analyzed by Real Time PCR.
In cancerous cell lines mortality increases significantly by a concentration-dependent manner. Moreover, a marked decrease observed in the expression of ODC1 gene in cancer cell lines. In comparison of two cancer cell lines, MDA-MB-231cell line more affected by licorice root extract.
The result of our study highlights the potential influences of Glycyrrhiza glabra extract on ODC1 gene expression in breast cancer cells and its relation to inhibition of cancer cell growth.

Aim: This study examines the sperm parameters (concentration, mobility and morphology) and the state of sperm DNA in infertile men exposed to various occupational exposures.
Material and This study was performed on 152 men who referred to Isfahan Fertility and Infertility Center )spring 2014 to autumn 2016( for diagnostic purposes. After an interview with all the participants, their semen samples were collected for assessment of sperm parameters and sperm chromatin health, based on the WHO protocol and the TUNEL method, respectively.
The results showed that in men with prolonged sitting, high physiological activity and with exposure to chemical compounds, they had lower sperm motility and higher sperm DNA damage than the presented criteria by previous studies. In addition, in men with DNA damage higher than 10%, there was a significant decrease in sperm parameters.
Occupational exposure has negative effects on sperm parameters and sperm chromatin health, but more studies are needed to prove these results.

Aim: In this study, solid hybrid material from the Schiff base complex was prepared inside and on the surface of NaY zeolite, and then their antibacterial properties against different bacteria (gram-positive and gram negative bacteria) was investigated.
Material and Antibacterial compounds were first prepared by sequential synthesis. So that Schiff base complexes of intermediate metals are used in two ways, one way through the vessel's method inside the bottle, inside the NaY zeolite cavities, and again by the factorizing, which is the same as the modification of the pitted compound surface, on NaOH zeolite were loaded. In the second part, the antibacterial activity of the synthesized compounds in the laboratory was investigated against gram-positive (Bacillus subtilis and Staphylococcus aureus) and gram negative bacteria (Pseudomonas aeruginosa and Escherichia coli).
The results show that solid hybrid materials from Schiff base complexes and Zeolite NaY has fine antibacterial activity (against gram negative bacteria such as Pseudomonas aeruginosa and Escherichia coli) compared with Gentamicin and Nalidixic acid as standard drugs. So, fine inhibition on bacterial growth till 24 hours.
The solid hybrid materials from Schiff base complexes and NaY Zeolite show fine inhibition on bacterial growth in comparison with standard drugs. In particular, these compounds can be used several times without losing their properties and making them industrially economical.

Aim: This study was carried out to investigate the application of different magnetic intensities on the sperm freezing medium.
Material and In this experiment, the magnetic field induction of 0, 2000, 4000 and 6000 Gauss was used to determine the optimum intensity during the freeze-thawing process. Semen samples were collected from 10 pieces of 24-week-old Ross 308 broiler chickens using abdominal massage technique. In this study, the experimental treatments were: 1) ordinary diluent, 2) G2000-intensive magnetic diluent, 3) G4000-intensive magnetic diluent, and G6000-intensive magnetic diluent. The used diluent in this study was the Lake diluent. This diluent was mixed with 1% soy lecithin and 5% glycerol, and then on the basis of the experimental treatments, they encountered different magnetic intensities. Diluted sperm was frozen based on each treatment, after cooling in a 0.25 ml straws. After freezing some sperm parameters such as total and progressive motilities, morphology, membrane integrity, MDA production, apoptosis status and mitochondrial activity were evaluated.
Results showed that different magnetic fields had no significant effect on total and progressive mobilities, membrane integrity, morphology, lipid peroxidation, acrosome integrity and apoptosis mechanisms of rooster sperm. Just mitochondrial membrane potential in the control group was higher than other groups (60.5%, P It seems that exposure of rooster semen cryopreservation media with magnetic field cannot be efficient for quality of sperm after thawing.