Royan Institute for Stem Cell Biology and Technology

Tehran, Iran

Royan Institute for Stem Cell Biology and Technology

Tehran, Iran
Time filter
Source Type

Khezri S.,Tarbiat Modares University | Javan M.,Tarbiat Modares University | Goudarzvand M.,Tarbiat Modares University | Semnanian S.,Tarbiat Modares University | Baharvand H.,Royan Institute for Stem Cell Biology and Technology
Journal of Molecular Neuroscience | Year: 2015

Multiple sclerosis is a chronic inflammatory demyelinating disease of the central nervous system. Cyclic AMP and its analogs enhance regeneration of adult mammalian central nervous system (CNS). Endogenous neural stem cells (NSCs) play a pivotal role in CNS regeneration, producing new neuron and glial cells. Here, we examined the effect of dibutyryl cyclic AMP (dbcAMP) on experimental autoimmune encephalomyelitis (EAE) symptoms, endogenous remyelination, and recruitment of NSCs. EAE was induced by immunizing mice using myelin oligodendrocyte glycoprotein peptide and pertussis toxin. Proliferative cells within CNS were labeled using repetitive systemic injections of 5-bromo-2-deoxyuridine (BrdU) before EAE induction. Myelin staining was performed using Luxol fast blue. The number of nestin+and BrdU+cells in subventricular zone (SVZ) and olfactory bulb (OB) was evaluated using immunohistochemistry. dbcAMP suppressed EAE progression and decreased the extent of demyelinated plaques in the lumbar spinal cord. EAE induction reduced the number of proliferative cells in SVZ and increased their population in OB. EAE also increased the number of nestin+cells in OB. We also found that dbcAMP increased the recruitment of NSCs into the OB and brain parenchyma of EAE mice. Our results suggest dbcAMP as a potential therapy for inducing myelin repair in the context of demyelinating diseases like multiple sclerosis. Its positive effect seems to be mediated, at least partially, by endogenous neural stem cells and their increased recruitment. © 2013 Springer Science+Business Media New York.

Yazdi A.,Tarbiat Modares University | Baharvand H.,Royan Institute for Stem Cell Biology and Technology | Baharvand H.,University of Tehran | Javan M.,Tarbiat Modares University | Javan M.,Royan Institute for Stem Cell Biology and Technology
Neuroscience | Year: 2015

Multiple sclerosis (MS) is a chronic, progressive demyelinating disorder which affects the central nervous system (CNS) and is recognized as the major cause of nervous system disability in young adults. Enhancing myelin repair by stimulating endogenous progenitors is a main goal in efforts for MS treatment. Fingolimod (FTY720) which is administrated as an oral medicine for relapsing-remitting MS has direct effects on neural cells. In this study, we hypothesized if daily treatment with FTY720 enhances endogenous myelin repair in a model of local demyelination induced by lysolecithin (LPC). We examined the response of inflammatory cells as well as resident OPCs and evaluated the number of newly produced myelinating cells in animals which were under daily treatment with FTY720. FTY720 at doses 0.3 and 1. mg/kg decreased the inflammation score at the site of LPC injection and decreased the extent of demyelination. FTY720 especially at the lower dose increased the number of remyelinated axons and newly produced myelinating cells. These data indicate that repetitive treatment with FTY720, behind an anti-inflammatory effect, exerts beneficial effects on the process of endogenous repair of demyelinating insults. © 2015 IBRO.

Klattenhoff C.A.,Massachusetts Institute of Technology | Scheuermann J.C.,Massachusetts Institute of Technology | Surface L.E.,Massachusetts Institute of Technology | Bradley R.K.,Massachusetts Institute of Technology | And 13 more authors.
Cell | Year: 2013

Long noncoding RNAs (lncRNAs) are often expressed in a development-specific manner, yet little is known about their roles in lineage commitment. Here, we identified Braveheart (Bvht), a heart-associated lncRNA in mouse. Using multiple embryonic stem cell (ESC) differentiation strategies, we show that Bvht is required for progression of nascent mesoderm toward a cardiac fate. We find that Bvht is necessary for activation of a core cardiovascular gene network and functions upstream of mesoderm posterior 1 (MesP1), a master regulator of a common multipotent cardiovascular progenitor. We also show that Bvht interacts with SUZ12, a component of polycomb-repressive complex 2 (PRC2), during cardiomyocyte differentiation, suggesting that Bvht mediates epigenetic regulation of cardiac commitment. Finally, we demonstrate a role for Bvht in maintaining cardiac fate in neonatal cardiomyocytes. Together, our work provides evidence for a long noncoding RNA with critical roles in the establishment of the cardiovascular lineage during mammalian development. © 2013 Elsevier Inc.

Moradi S.,Royan Institute for Stem Cell Biology and Technology | Moradi S.,University of Tehran | Asgari S.,University of Queensland | Baharvand H.,Royan Institute for Stem Cell Biology and Technology | Baharvand H.,University of Tehran
Stem Cells | Year: 2014

It is now well-established that somatic cells can be reprogrammed to alternative cell fates by ectopic coexpression of defined factors. Reprogramming technology has uncovered a huge plasticity besides gene regulatory networks (GRNs) of differentiated cell states. MicroRNAs (miRNAs), which are an integral part of GRNs, have recently emerged as a powerful reprogramming toolbox. They regulate numerous genes, thereby modulating virtually all cellular processes, including somatic cell reprogramming. Not only can miRNAs provide novel opportunities for interrogating mechanisms of induced pluripotency and direct lineage reprogramming but they also offer hope for the efficient creation of safe cell sources for regenerative medicine. In reviewing landmark roles of miRNAs in cell reprogramming, we offer suggestions for evolution of the reprogramming field.© AlphaMed Press 2013.

Zangeneh M.,Royan Institute for Stem Cell Biology and Technology
Obstetrics and Gynecology | Year: 2010

Background: Pyomyoma (suppurative leiomyoma) is a rare disease that is a serious complication. Most cases have occurred in pregnant or postmenopausal women. Case: A perimenopausal woman presented with fever and shoulder pain. She had no predisposing factors or history of leiomyoma. Ultrasonographic as well as abdominal and pelvic computed tomography scans showed an enlarged uterus with two large masses. Internal heterogeneous echogenicity was noted in the lower segment and body of the uterus. The elevated temperature continued despite a 3-day antibiotic course of clindamycin, ceftriaxone, and gentamicin. With a clinical impression of infected leiomyoma, she underwent a total abdominal hysterectomy and bilateral salpingo-oophorectomy. Pathological findings showed a leiomyoma with abscess formation. The patient responded well to surgery. Conclusion: Pyomyoma may be difficult to diagnose, especially in women with a nonspecific clinical presentation. Delayed diagnosis may result in serious complications, and surgery and broad spectrum antibiotics are indicated. © 2010 by The American College of Obstetricians and Gynecologists. Published by Lippincott Williams & Wilkins.

Abbasalizadeh S.,Royan Institute for Stem Cell Biology and Technology | Baharvand H.,Royan Institute for Stem Cell Biology and Technology | Baharvand H.,University of Tehran
Biotechnology Advances | Year: 2013

Recent technological advances in the generation, characterization, and bioprocessing of human pluripotent stem cells (hPSCs) have created new hope for their use as a source for production of cell-based therapeutic products. To date, a few clinical trials that have used therapeutic cells derived from hESCs have been approved by the Food and Drug Administration (FDA), but numerous new hPSC-based cell therapy products are under various stages of development in cell therapy-specialized companies and their future market is estimated to be very promising. However, the multitude of critical challenges regarding different aspects of hPSC-based therapeutic product manufacturing and their therapies have made progress for the introduction of new products and clinical applications very slow. These challenges include scientific, technological, clinical, policy, and financial aspects. The technological aspects of manufacturing hPSC-based therapeutic products for allogeneic and autologous cell therapies according to good manufacturing practice (cGMP) quality requirements is one of the most important challenging and emerging topics in the development of new hPSCs for clinical use. In this review, we describe main critical challenges and highlight a series of technological advances in all aspects of hPSC-based therapeutic product manufacturing including clinical grade cell line development, large-scale banking, upstream processing, downstream processing, and quality assessment of final cell therapeutic products that have brought hPSCs closer to clinical application and commercial cGMP manufacturing. © 2013 Elsevier Inc.

Zomorodian E.,Royan Institute for Stem Cell Biology and Technology | Baghaban Eslaminejad M.,Royan Institute for Stem Cell Biology and Technology
Stem Cells International | Year: 2012

While small bone defects heal spontaneously, large bone defects need surgical intervention for bone transplantation. Autologous bone grafts are the best and safest strategy for bone repair. An alternative method is to use allogenic bone graft. Both methods have limitations, particularly when bone defects are of a critical size. In these cases, bone constructs created by tissue engineering technologies are of utmost importance. Cells are one main component in the manufacture of bone construct. A few cell types, including embryonic stem cells (ESCs), adult osteoblast, and adult stem cells, can be used for this purpose. Mesenchymal stem cells (MSCs), as adult stem cells, possess characteristics that make them good candidate for bone repair. This paper discusses different aspects of MSCs that render them an appropriate cell type for clinical use to promote bone regeneration. © 2012 Elham Zomorodian and Mohamadreza Baghaban Eslaminejad.

Farrokhi A.,Royan Institute for Stem Cell Biology and Technology
Cellular and molecular biology (Noisy-le-Grand, France) | Year: 2012

Reverse transcription quantitative PCR (RT—qPCR) is one of the best methods for the study of mesenchymal stem cell (MSC) differentiation by gene expression analysis. This technique needs appropriate reference or housekeeping genes (HKGs) to normalize the expression of the genes of interest. In the present study the expression stability of six widely used HKGs including Actb, Btub, Hprt, B2m, Gusb and Tfrc was investigated during rat MSC differentiation into osteocytes, adipocytes and chondrocytes lineages using geNorm and NormFinder software. RT—qPCR data analyzed by geNorm revealed the different sets of suitable reference genes for each cell type. NormFinder also showed similar results. Analysis of the combined data of MSCs with each differentiated cell type revealed the considerable shift in expression of some reference genes during differentiation; for example Gusb and B2m were among the least stable genes in MSCs but the most stable in chondrocytes. Normalization of specific genes for each lineage by different reference genes showed considerable difference in their expression fold change. In conclusion, for the appropriate analysis of gene expression during rat MSC differentiation and also for monitoring differentiation procedures, it is better to consider precisely the reference gene stability and select suitable reference genes for each purpose.

Larijani M.R.,Royan Institute for Stem Cell Biology and Technology
Stem cells and development | Year: 2011

Traditionally, undifferentiated pluripotent human embryonic and induced pluripotent stem cells (hESCs and hiPSCs) have been expanded as monolayer colonies in adhesion culture, both in the presence or absence of feeder cells. However, the use of pluripotent stem cells poses the need to scale-up current culture methods. Herein, we present the cultivation of 2 hESC lines (Royan H5 and Royan H6) and 2 hiPSC lines (hiPSC1 and hiPSC4) as carrier-free suspension aggregates for an extended period of time. The cells proliferated over multiple passages kept a stable karyotype, which successfully maintained an undifferentiated state and pluripotency, as determined by marker expressions in addition to in vitro spontaneous and directed differentiation. Additionally, these cells can be easily frozen and thawed without losing their proliferation, karyotype stability, and developmental potential. Transcriptome analysis of the 3 lines revealed that the adherent culture condition was nearly identical to the suspension culture in Royan H5 and hiPSC1, but not in Royan H6. It remains unclear whether this observation at the transcript level is biologically significant. In comparison with recent reports, our study presents a low-cost procedure for long-term suspension expansion of hESCs and hiPSCs with the capability of freeze/thawing, karyotype stability, and pluripotency. Our results will pave the way for scaled up expansion and controlled differentiation of hESCs and hiPSCs needed for cell therapy, research, and industrial applications in a bioreactor culture system.

Royan Institute for Stem Cell Biology and Technology | Date: 2014-08-19

The various embodiments herein provide a method for derivation and long term establishment of ground state pluripotent embryonic stem cells. Further the embodiments herein provides a method to inhibit the ERK and TGF signalling pathways for long term maintenance of the embryonic stem cells. The R2i mouse embryonic stem (ES) cells are derived from 3.5 day blastocysts. The mouse ES cells are cultured in media containing R2i and 2i inhibitors of ERK and TGF pathways. The ES cells are subjected to in vitro and in vivo differentiation. The ES cells are subjected to RT-PCR and qRT-PCR, flow cytometry and karyotyping. The result reveals that the R2i maintains the ground state of ES cells and self renewal. Also R2i increases embryonic cleavage and clonal propagation of ES. Further R2i asserts genomic integrity and pluripotency of ES.

Loading Royan Institute for Stem Cell Biology and Technology collaborators
Loading Royan Institute for Stem Cell Biology and Technology collaborators