Royan Institute for Biotechnology

Eşfahān, Iran

Royan Institute for Biotechnology

Eşfahān, Iran
Time filter
Source Type

Jodeiri Farshbaf M.,New Mexico State University | Ghaedi K.,University of Isfahan | Ghaedi K.,Royan Institute for Biotechnology
Neurotoxicity Research | Year: 2017

Huntington’s disease (HD) as an inherited neurodegenerative disorder leads to neuronal loss in striatum. Progressive motor dysfunction, cognitive decline, and psychiatric disturbance are the main clinical symptoms of the HD. This disease is caused by expansion of the CAG repeats in exon 1 of the huntingtin which encodes Huntingtin protein (Htt). Various cellular and molecular events play role in the pathology of HD. Mitochondria as important organelles play crucial roles in the most of neurodegenerative disorders like HD. Critical roles of the mitochondria in neurons are ATP generation, Ca2+ buffering, ROS generation, and antioxidant activity. Neurons as high-demand energy cells closely related to function, maintenance, and dynamic of mitochondria. In the most neurological disorders, mitochondrial activities and dynamic are disrupted which associate with high ROS level, low ATP generation, and apoptosis. Accumulation of mutant huntingtin (mHtt) during this disease may evoke mitochondrial dysfunction. Here, we review recent findings to support this hypothesis that mHtt could cause mitochondrial defects. In addition, by focusing normal huntingtin functions in neurons, we purpose mitochondria and Huntingtin association in normal condition. Moreover, mHtt affects various cellular signaling which ends up to mitochondrial biogenesis. So, it could be a potential candidate to decline ATP level in HD. We conclude how mitochondrial biogenesis plays a central role in the neuronal survival and activity and how mHtt affects mitochondrial trafficking, maintenance, integrity, function, dynamics, and hemostasis and makes neurons vulnerable to degeneration in HD. © 2017 Springer Science+Business Media, LLC

Hashemi M.-S.,University of Isfahan | Hashemi M.-S.,Royan Institute for Biotechnology | Ghaedi K.,University of Isfahan | Ghaedi K.,Royan Institute for Biotechnology | And 7 more authors.
Neuroscience | Year: 2013

Fibronectin type III domain-containing 5 protein (Fndc5) or peroxisomal protein, is a type I membrane protein that has 209 amino acid residues. Previous studies by our group have shown an increase in its expression after retinoic acid treatment of mouse embryonic stem cells (mESCs) during the process of neural differentiation, leading us to conclude that it might be involved in neurogenesis. In the present study, we have constructed an inducible short hairpin RNA (shRNA) vector that is expressed under induction by doxycycline. Next, we generated a stably transformed mESCs line that expressed shRNA against the Fndc5 gene. The knockdown of Fndc5 was performed in two stages of mESC neural differentiation during and post-neural progenitor (NP) formation. Our results indicated that in the process of NPs formation, decreased Fndc5 expression significantly reduced expression of NPs and mature neuronal markers which modulated neuronal differentiation. Decreased Fndc5 expression during the post-NPs formation stage also caused significant reduction in the levels of mature neuronal markers. Fndc5 knockdown during both stages significantly affected both neuronal and astrocytes maturation. We have concluded that Fndc5 expression is required for the appropriate neural differentiation of mESCs. These data confirm the importance of Fndc5 in the generation and development of the nervous system. © 2012 IBRO.

Allafchian A.,Isfahan University of Technology | Mirahmadi-Zare S.Z.,Royan Institute for Biotechnology | Gholamian M.,Isfahan University of Technology
IEEE Sensors Journal | Year: 2017

Herein, the micro extraction and quantification of lead (II) ions were investigated in trace levels on in situ pulse anodic stripping voltammetry (DPASV) and polytetrafluorethylene (PTFE) membrane-based liquid three-phase micro extraction. The voltammetric cell contained the acceptor solution and reference, the counter, and working electrodes. The modified Pt electrode with 3-Trimethoxysilyl-1-propanethiol and gold nanoparticles (Au NPs), respectively, was applied as the working electrode. The voltammetric cell combined with DPASV was utilized in situ during the extraction time. The obtained results showed the effect of different factors on the pre-concentration and micro extraction of lead ions, including the organic solvent, pH of the donor and acceptor phases, concentration of the complexion agent, extraction time, stirring rate, and electrochemical factors; also, the optimal extraction conditions were established. The final stable signal was achieved after 18-min extraction time for analytical applications. The relative standard deviation and the enrichment factor were obtained to be 6.0% ( n=5 ) and 18, respectively. The calibration curve was obtained in the range of 0.207-62.1 ppb Pb(II) (analytical equation: y= 3.986 x + 0.381), and the limit of detection was found to be 0.021 ppb with optimum conditions. The lead (II) ions were determined in fish, rice, and wastewater samples. © 2001-2012 IEEE.

Ghasemi-Mobarakeh L.,Isfahan University of Technology | Prabhakaran M.P.,National University of Singapore | Nematollahi M.,Royan Institute for Biotechnology | Karbalaie K.,Royan Institute for Biotechnology | And 2 more authors.
International Journal of Polymeric Materials and Polymeric Biomaterials | Year: 2014

With recent advances in developmental and stem cell biology, the application of stem cells in tissue engineering has received great attention and designing of suitable scaffolds to support cell growth, differentiation, and functional tissue organization are advancing toward effective tissue regeneration. Regeneration of the infarct myocardium after myocardial infarction (MI), which is caused by the abrupt occlusion of one or more of the coronary arteries in the heart is one of the most demanding aspects in tissue engineering. Embryonic stem cells (ESCs) can differentiate into many cell types and has been considered as a cell source for cardiac regeneration. In this regard, nanofibrous scaffolds received great attention in tissue engineering field due to their similarity in morphology to native extracellular matrix (ECM) and various scaffolds have been studied as cardiac patches over the previous years. In this study poly (ε-caprolactone) (PCL)/gelatin nanofibrous scaffolds were fabricated by electrospinning and embroyonic bodies (EBs) were formed using ESCs seeded on the nanofibrous scaffolds. SEM images revealed cell outgrowth from EBs and the spreading of cells over the nanofibrous scaffolds were observed. Immunocytochemistry results showed the cellular expression of cardiac proteins, namely α-actinin and connexin 43 on the nanofibrous scaffolds indicating the differentiation of EBs to cardiomyocytes. Results of our study showed that PCL/gelatin nanofibrous scaffolds can act as a promising substrate for differentiation of EBs to cardiomyocytes and could be applied for cardiac tissue engineering. © 2014 Taylor and Francis Group, LLC.

Honardoost M.A.,University of Isfahan | Kiani-Esfahani A.,Royan Institute for Biotechnology | Ghaedi K.,University of Isfahan | Ghaedi K.,Royan Institute for Biotechnology | And 4 more authors.
Gene | Year: 2014

Background: Multiple sclerosis is an inflammatory autoimmune disease widely characterized by myelin destruction of CNS. Th-17 cells, have been demonstrated to play a crucial role in pathogenesis of MS. MicroRNAs are a new class of non-coding RNAs that participate in post-transcriptional regulation of gene expression. Previous studies have reported a potential role of various miRNAs in induction of Th-17 differentiation and progress of autoimmune diseases. In recent years, it has been shown that miR-326 and miR-26a involved in progress of Th-17 and MS disease. Objective: To evaluate expression pattern of miR-326 and miR-26a in peripheral blood lymphocytes of relapsing-remitting MS patients during relapsing and remitting phases compared to healthy control subjects. Materials and methods: Forty RR-MS patients of Isfahan population were diagnosed as relapsing (n. = 20) or remitting phase (n. = 20) patients according to clinical manifests and expression level of miR-26a and miR-326 was measured in these groups by quantitative real time PCR method compared to 20 healthy controls. In-silico molecular signaling pathway enrichment analysis was also performed on validated and predicted targets (targetome) of miR-26a by DAVID database to explore possible role of miR-26a in Th17 differentiation. Results: We observed up-regulation of both miR-326 and miR-26a in relapsing phase of multiple sclerosis patients compared with remitting phase (p value. = 0.0001) and healthy controls (p value. = 0.0091). ROC curve analysis confirmed valuable and precise potential of miR-326 to discriminate between relapsing and remitting phases of multiple sclerosis with specificity and sensitivity of 100% at a proposed optimum cutoff point. Furthermore, in-silico molecular signaling pathway enrichment analysis detected TGF-β signaling pathway as one of the most statistically relevant pathway with miR-26a targetome. Conclusion: Our results confirmed potential of miR-326 as a diagnostic biomarker to discriminate between relapsing and remitting phases of multiple sclerosis disease. Similar expression pattern to miR-326 and in-silico molecular enrichment analysis altogether suggest an inducing role of miR-26a in differentiation of pathogenic Th17 cells during pathogenesis of multiple sclerosis by targeting major components of the TGF-β signaling pathway (i.e. SMAD4 and SMAD1) and disarrangement of this signaling pathway. © 2014 Elsevier B.V.

Hosseini S.M.,Royan Institute for Biotechnology | Nasr-Esfahani M.H.,Royan Institute for Biotechnology
Reproductive BioMedicine Online | Year: 2016

In October 2012, the American Society for Reproductive Medicine (ASRM) and, in March 2012, the European Society of Human Reproduction and Embryology (ESHRE), lifted the categorization of oocyte cryopreservation as being "experimental" and endorsed its entrance into the mainstream of assisted reproductive techniques. This change in policy, with the considerable advantages that oocytes offer over embryos for cryopreservation, has increased applications of oocyte cryopreservation in assisted reproduction techniques. A deep understanding of oocyte cryobiology, however, is lagging behind the forces propelling the clinical application of oocyte cryopreservation. We have drawn attention to this shortcoming by initiating a debate on whether a vitrified-warmed oocyte has the same characteristics as its fresh sibling. The answer to this question may explain why the oocyte cryopreservation success rate is as yet far from satisfactory and why cryopreserved oocytes should be treated differently from their fresh siblings. A fresh look at the characteristic features of oocytes after cryopreservation is the main scope of this review as a stimulus to further improvement of oocyte cryopreservation. © 2015.

Esfahani M.H.N.,Royan Institute for Biotechnology | Tavalaee M.,Royan Institute for Reproductive Biomedicine
International Journal of Fertility and Sterility | Year: 2012

Varicocele is considered as one of the main etiologies of male infertility. Along with altered semen parameters, increased DNA fragmentation is believed to play an important role in varicocele-induced infertility. DNA damage may result from intra- or extra-testicular factors. Among these, apoptosis, abnormal chromatin packaging and oxidative stress are the most researched and are addressed in this review. Significant evidence suggests that varicoceles have a harmful effect on testicular function and a varicocelectomy not only prevents progressive decline in testicular function, but also reverses the damage. However, the degree to which varicocele repair improves pregnancy rates and the success of assisted reproductive technology (ART) remains controversial. Therefore, the role of varicocele repair on DNA fragmentation is also discussed.

Khazaie Y.,Royan Institute for Biotechnology | Nasr Esfahani M.H.,Royan Institute for Biotechnology | Nasr Esfahani M.H.,Isfahan Fertility and Infertility Center
International Journal of Fertility and Sterility | Year: 2014

MicroRNAs (miRNAs) are small non-coding single stranded RNA molecules that are physiologically produced in eukaryotic cells to regulate or mostly down-regulate genes by pairing with their complementary base-sequence in related mRNA molecules in the cytoplasm. It has been reported that other than its function in many physiological cell processes, dysregulation of miRNAs plays a role in the development of many diseases. In this short review, the association between miRNAs and some male reproductive disorders is surveyed. Male factor Infertility is a devastating problem from which a notable percentage of couples suffer. However, the molecular mechanism of many infertility disorders has not been clearly elucidated. Since miRNAs have an important role in numerous biological cell processes and cellular dysfunctions, it is of interest to review the related literature on the role of miRNAs in the male reproductive organs. Aberrant expression of specific miRNAs is associated with certain male reproductive dysfunctions. For this reason, assessment of expression of such miRNAs may serve as a suitable molecular biomarker for diagnosis of those male infertility disorders. The presence of a single nucleotide polymorphism (SNP) at the miRNAs' binding site in its targeted mRNA has been reported to have an association with idiopathic male infertility. Also, a relation with male infertility has been shown with SNP in the genes of the factors necessary for miRNA biogenesis. Therefore, focusing on the role of miRNAs in male reproductive disorders can further elucidate the molecular mechanisms of male infertility and generate the potential for locating efficient biomarkers and therapeutic agents for these disorders.

Meamar R.,Islamic Azad University at Najafabad | Nasr-Esfahani M.H.,Royan Institute for Biotechnology | Mousavi S.A.,Isfahan University of Medical Sciences | Basiri K.,Isfahan University of Medical Sciences
Journal of Clinical Neuroscience | Year: 2013

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder of upper and lower motor neurons, characterized by progressive muscular atrophy and weakness which culminates in death within 2-5 years. Despite various hypotheses about the responsible mechanisms, the etiology of ALS remains incompletely understood. However, it has been recently postulated that stem cell therapy could potentially target several mechanisms responsible for the etiology of ALS and other nervous system disorders, and could be regarded as one of the most promising therapeutic strategies for ALS treatment. We present a brief review of different methods of stem cell therapy in ALS patients and discuss the results with different cell types and routes of administration. © 2013 Elsevier Ltd. All rights reserved.

Deemeh M.R.,Royan Institute for Biotechnology | Tavalaee M.,Royan Institute for Biotechnology | Nasr-Esfahani M.H.,Royan Institute for Biotechnology | Nasr-Esfahani M.H.,Isfahan Fertility and Infertility Center
Reproductive Sciences | Year: 2015

Artificial oocyte activation (AOA) has shown to improve fertility in severe male infertility following intracytoplasmic sperm insemination (ICSI). However, the effect of AOA on the health status of children has not been studied. This pilot historical cohort study aims to evaluate physical and mental health of 79 and 89 children from 275 and 406 couples undergoing ICSI-AOA using ionomycin and conventional ICSI, respectively. The outcomes assessed were clinical pregnancy, abortion, type of delivery, and health of children (major birth defect, mental and behavior status). No significant differences were observed between the ICSI-AOA and the ICSI groups for these parameters, and the rate of major birth defects were not significantly different between the 2 groups. In this study, AOA has not imposed a greater risk on physical and mental health of children born through AOA, but for such a solid conclusion, further trails with higher number of cases are required and conclusions drawn are limited to this study. © The Author(s) 2014.

Loading Royan Institute for Biotechnology collaborators
Loading Royan Institute for Biotechnology collaborators