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Stem Cell Research

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https://www.readbyqxmd.com/read/27865162/irradiation-induced-secretion-of-bmp4-by-marrow-cells-causes-marrow-adipogenesis-post-myelosuppression
#1
Manmohan S Bajaj, Rohan S Kulkarni, Suprita S Ghode, Lalita S Limaye, Vaijayanti P Kale
Pre-transplant myeloablation is associated with marrow adipogenesis, resulting in delayed engraftment of hematopoietic stem cells (HSCs). This is strongly undesirable, especially when the donor HSCs are fewer in numbers or have compromised functionality. The molecular mechanisms behind irradiation-induced marrow adipogenesis have not been extensively investigated. Here we show that bone marrow (BM) cells, especially T-cells and stromal cells, express and secrete copious amounts of BMP4 in response to irradiation, which causes the bone marrow stromal cells to commit to adipocyte lineage, thereby contributing to an increase in bone marrow adipogenesis...
November 9, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27838585/immune-cell-recruitment-in-teratomas-is-impaired-by-increased-wnt-secretion
#2
Iris Augustin, Dyah L Dewi, Jennifer Hundshammer, Eugen Rempel, Fabian Brunk, Michael Boutros
Wnt signaling plays a central role in tumor initiation and tumor progression. Mutations in Wnt pathway components, such as the tumor suppressor APC, lead to malignant transformation. While previous studies focused on Wnt-related changes in cancer cells, the impact of aberrant Wnt signaling on the tumor microenvironment is only beginning to emerge. In order to investigate the role of increased Wnt secretion on tumor growth and the microenvironment, we generated a novel germ cell tumor model by overexpressing the Wnt secretion factor Evi/Wls in mouse embryonic stem cells...
October 29, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27833043/efficient-generation-of-pancreatic-%C3%AE-like-cells-from-the-mouse-gallbladder
#3
Yuhan Wang, Feorillo Galivo, Carl Pelz, Annelise Haft, Jonghyeob Lee, Seung K Kim, Markus Grompe
Direct reprogramming is a promising approach for the replacement of β cells in diabetes. Reprogramming of cells originating from the endodermal lineage, such as acinar cells in the pancreas, liver cells and gallbladder cells has been of particular interest because of their developmental proximity to β cells. Our previous work showed that mouse gallbladder epithelium can be partially reprogrammed in vitro to generate islet-like cells (rGBC1). Here, the reprogramming protocol was substantially improved, yielding cells (rGBC2) closer to functional β cells than the 1st generation method with higher conversion efficiency and insulin expression...
October 27, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789411/induced-pluripotent-stem-cells-ipscs-derived-from-a-symptomatic-carrier-of-a-s305i-mutation-in-the-microtubule-associated-protein-tau-mapt-gene-causing-frontotemporal-dementia
#4
Natakarn Nimsanor, Ida Jørring, Mikkel A Rasmussen, Christian Clausen, Ulrike A Mau-Holzmann, Narisorn Kitiyanant, Jørgen E Nielsen, Troels T Nielsen, Poul Hyttel, Bjørn Holst, Benjamin Schmid
Frontotemporal dementia with parkinsonism linked to chromosome 17q21.2 (FTDP-17) is an autosomal-dominant neurodegenerative disorder. Mutations in the gene coding the microtubule-associated protein tau (MAPT) can cause FTDP-17 but the underlying mechanisms of the disease are still unknown. Induced pluripotent stem cells (iPSCs) hold great promise to model FTDP-17 as such cells can be differentiated in vitro to the required neuronal cell type. Here, we report the generation of iPSCs from a 44-year-old symptomatic woman carrying a S305I mutation in the MAPT-gene...
October 20, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789408/lymphoblast-derived-integration-free-ips-cell-line-from-a-female-67-year-old-alzheimer-s-disease-patient-with-trem2-r47h-missense-mutation
#5
Friederike Schröter, Kristel Sleegers, Elise Cuyvers, Martina Bohndorf, Wasco Wruck, Christine Van Broeckhoven, James Adjaye
Human lymphoblast cells from a female patient diagnosed with Alzheimer's disease (AD) possessing the missense mutation TREM2 p.R47H were used to generate integration-free induced pluripotent stem cells (iPSCs) employing episomal plasmids expressing OCT4, SOX2, NANOG, LIN28, c-MYC and L-MYC. The iPSCs retained the TREM2 mutation, and were defined as pluripotent based on (i) expression of pluripotent-associated markers, (ii) embryoid body-based differentiation into cell types representative of the three germ layers and (iii) the similarity between the transcriptomes of the iPSC line and the human embryonic stem cell line H1 with a Pearson correlation of 0...
October 20, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789406/characterization-of-dermal-fibroblast-derived-ipscs-from-a-patient-with-low-grade-steatosis
#6
Marie-Ann Kawala, Martina Bohndorf, Nina Graffmann, Wasco Wruck, Kurt Zatloukal, James Adjaye
Primary fibroblasts from a low grade steatosis patient were reprogrammed by transduction of a combination of two episomal-based plasmids OCT4,SOX2, c-MYC and KLF4. iPSCs were characterized by immunocytochemistry, embryonic body-formation, DNA-fingerprint karyotype analysis and comparative transcriptome analyses with the human embryonic stem cell line H1 revealed a Pearsons correlation of 0.9251.
October 20, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789412/characterization-of-dermal-fibroblast-derived-ipscs-from-a-patient-with-high-grade-steatosis
#7
Marie-Ann Kawala, Martina Bohndorf, Nina Graffmann, Wasco Wruck, Kurt Zatloukal, James Adjaye
Primary fibroblasts from a high grade steatosis patient were reprogrammed by transduction of retroviruses OCT4, SOX2, c-MYC and KLF4. IPSCs were characterized by immunocytochemistry, embryoid body-formation, DNA-fingerprint, karyotype analysis and comparative transcriptome analyses with the human embryonic stem cell line H1 revealed a Pearsons correlation coefficient of 0.9287. Resource table.
October 19, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789410/lymphoblast-derived-integration-free-ipsc-lines-from-a-female-and-male-alzheimer-s-disease-patient-expressing-different-copy-numbers-of-a-coding-cnv-in-the-alzheimer-risk-gene-cr1
#8
Friederike Schröter, Kristel Sleegers, Caroline Van Cauwenberghe, Martina Bohndorf, Wasco Wruck, Christine Van Broeckhoven, James Adjaye
Human lymphoblast cells from a female and male patient diagnosed with Alzheimer's disease (AD) with different genotypes of a functional copy number variation (CNV) in the AD risk gene CR1 were used to generate integration-free induced pluripotent stem cells (iPSCs) employing episomal plasmids expressing OCT4, SOX2, NANOG, LIN28, c-MYC and L-MYC. The iPSCs retained the CR1 CNV, and comparative transcriptome analyses with the human embryonic stem cell line H1 revealed a Pearson correlation of 0.956 for AD1-CR10 and 0...
October 19, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789401/generation-of-human-induced-pluripotent-stem-cell-ipsc-line-from-an-unaffected-female-carrier-of-mucopolysaccharidosis-type-ii-mps-ii-disorder
#9
Eszter Varga, Csilla Nemes, Eszter Kovács, István Bock, Norbert Varga, Anita Fehér, András Dinnyés, Julianna Kobolák
Peripheral blood was collected from a 39-year-old unaffected female carrier of an X-linked recessive mutation of Iduronate 2-sulfatase gene (NM_000202.7(IDS):c.85C>T) causing MPS II (OMIM 309900). Peripheral blood mononuclear cells (PBMCs) were reprogrammed by lentiviral delivery of a self-silencing hOKSM polycistronic vector. The pluripotency of iPSC line was confirmed by the expression of pluripotency-associated markers and in vitro spontaneous differentiation towards the 3 germ layers. The iPSC showed normal karyotype...
October 3, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789404/establishment-of-ehmt1-mutant-induced-pluripotent-stem-cell-ipsc-line-from-a-11-year-old-kleefstra-syndrome-ks-patient-with-autism-and-normal-intellectual-performance
#10
Eszter Varga, Csilla Nemes, Zsuzsanna Táncos, István Bock, Sára Berzsenyi, György Lévay, Viktor Román, Julianna Kobolák, András Dinnyés
Peripheral blood was collected from a clinically characterized female Kleefstra syndrome patient with a heterozygous, de novo, premature termination codon (PTC) mutation (NM_024757.4(EHMT1):c.3413G>A; p.Trp1138Ter). Peripheral blood mononuclear cells (PBMCs) were reprogrammed with the human OSKM transcription factors using the Sendai-virus (SeV) delivery system. The pluripotency of transgene-free iPSC line was verified by the expression of pluripotency-associated markers and by in vitro spontaneous differentiation towards the 3 germ layers...
October 2, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789399/generation-of-mucopolysaccharidosis-type-ii-mps-ii-human-induced-pluripotent-stem-cell-ipsc-line-from-a-1-year-old-male-with-pathogenic-ids-mutation
#11
Eszter Varga, Csilla Nemes, István Bock, Norbert Varga, Anita Fehér, András Dinnyés, Julianna Kobolák
Peripheral blood was collected from a 1-year-old male patient with an X-linked recessive mutation of Iduronate 2-sulfatase (IDS) gene (NM_000202.7(IDS):c.85C>T) causing MPS II (OMIM 309900). Peripheral blood mononuclear cells (PBMCs) were reprogrammed by lentiviral delivery of a self-silencing hOKSM polycistronic vector. The pluripotency of the iPSC line was confirmed by the expression of pluripotency-associated markers and in vitro spontaneous differentiation towards the 3 germ layers. The iPSC line showed normal karyotype...
October 1, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789398/generation-of-mucopolysaccharidosis-type-ii-mps-ii-human-induced-pluripotent-stem-cell-ipsc-line-from-a-3-year-old-male-with-pathogenic-ids-mutation
#12
Eszter Varga, Csilla Nemes, István Bock, Norbert Varga, Anita Fehér, Julianna Kobolák, András Dinnyés
Peripheral blood was collected from a 3-year-old male patient with an X-linked recessive mutation of Iduronate 2-sulfatase (IDS) gene (NM_000202.7(IDS):c.85C>T) causing MPS II (OMIM 309900). Peripheral blood mononuclear cells (PBMCs) were reprogrammed by lentiviral delivery of a self-silencing hOKSM polycistronic vector. The pluripotency of the iPSC line was confirmed by the expression of pluripotency-associated markers and in vitro spontaneous differentiation towards the 3 germ layers. The iPSC line showed normal karyotype...
October 1, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789394/generation-of-mucopolysaccharidosis-type-ii-mps-ii-human-induced-pluripotent-stem-cell-ipsc-line-from-a-7-year-old-male-with-pathogenic-ids-mutation
#13
Eszter Varga, Csilla Nemes, István Bock, Norbert Varga, Anita Fehér, Julianna Kobolák, András Dinnyés
Peripheral blood was collected from a 7-year-old male patient with an X-linked recessive mutation of Iduronate 2-sulfatase (IDS) gene (NM_000202.7(IDS):c.182C>T) causing MPS II (OMIM 309900). Peripheral blood mononuclear cells (PBMCs) were reprogrammed by lentiviral delivery of a self-silencing hOKSM polycistronic vector. The pluripotency of the iPSC line was confirmed by the expression of pluripotency-associated markers and in vitro spontaneous differentiation towards the 3 germ layers. The iPSC line showed normal karyotype...
October 1, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789397/generation-of-human-ips-cell-line-ctl07-ii-from-human-fibroblasts-under-defined-and-xeno-free-conditions
#14
Malin Kele, Kelly Day, Harriet Rönnholm, Jens Schuster, Niklas Dahl, Anna Falk
CTL07-II is a healthy feeder-free and characterized human induced pluripotent stem (iPS) cell line. Cultured under xeno-free and defined conditions. The line is generated from healthy human fibroblasts with non-integrating Sendai virus vectors encoding the four Yamanaka factors, OCT4, SOX2, KLF4 and cMYC. The generated iPS cells are free from reprogramming vectors and their purity, karyotypic stability and pluripotent capacity is confirmed.
September 30, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27771497/negative-effects-of-retinoic-acid-on-stem-cell-niche-of-mouse-incisor
#15
Jinlei Xi, Shijing He, Cizhao Wei, Wanyao Shen, Juan Liu, Ke Li, Yufeng Zhang, Jiang Yue, Zheqiong Yang
The continuous growth of mouse incisors depends on epithelial stem cells (SCs) residing in the SC niche, called labial cervical loop (LaCL). The homeostasis of the SCs is subtly regulated by complex signaling networks. In this study, we focus on retinoic acid (RA), a derivative of Vitamin A and a known pivotal signaling molecule in controlling the functions of stem cells (SCs). We analyzed the expression profiles of several key molecules of the RA signaling pathway in cultured incisor explants upon exogenous RA treatment...
September 29, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789409/generation-of-an-isogenic-gene-corrected-ipsc-line-from-a-symptomatic-57-year-old-female-patient-with-frontotemporal-dementia-caused-by-a-p301l-mutation-in-the-microtubule-associated-protein-tau-mapt-gene
#16
Natakarn Nimsanor, Narisorn Kitiyanant, Ulla Poulsen, Mikkel A Rasmussen, Christian Clausen, Ulrike A Mau-Holzmann, Jørgen E Nielsen, Troels T Nielsen, Poul Hyttel, Bjørn Holst, Benjamin Schmid
Frontotemporal dementia with parkinsonism linked to chromosome 17q21.2 (FTDP-17) is an autosomal-dominant neurodegenerative disorder. Mutations in the MAPT (microtubule-associated protein tau)-gene can cause FTDP-17, but the underlying pathomechanisms of the disease are still unknown. Induced pluripotent stem cells (iPSCs) hold great promise to model FTDP-17 as such cells can be differentiated in vitro to the required cell type. Furthermore, gene-editing approaches allow generating isogenic gene-corrected controls that can be used as a very specific control...
September 28, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789407/generation-of-induced-pluripotent-stem-cells-derived-from-a-77-year-old-healthy-woman-as-control-for-age-related-diseases
#17
Natakarn Nimsanor, Ida Jørring, Mikkel A Rasmussen, Christian Clausen, Ulrike A Mau-Holzmann, Christine Bus, Susanna A Hoffmann, Thomas Gasser, Torsten Kluba, Bjørn Holst, Benjamin Schmid
Induced pluripotent stem cells (iPSCs) hold great promise to model diseases, where the disease affected cell type is difficult to access. A major obstacle for the development of disease models is the lack of well characterized control iPSCs from old people not affected by such a disease. Furthermore, gene-editing approaches often require iPSCs from healthy donors, where pathogenic mutations can be inserted if patient material is not available. Here, we report the generation of an iPSC line (16423 #6) from a 77-year-old woman, who did not display any disease symptoms at the time, when the skin biopsy was taken...
September 28, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27789396/derivation-of-induced-pluripotent-stem-cells-from-a-familial-alzheimer-s-disease-patient-carrying-the-l282f-mutation-in-presenilin-1
#18
Anna Poon, Tong Li, Carlota Pires, Troels T Nielsen, Jørgen E Nielsen, Bjørn Holst, Andras Dinnyes, Poul Hyttel, Kristine K Freude
Mutations in presenilin 1 (PSEN1) lead to the most aggressive form of familial Alzheimer's disease (AD). Human induced pluripotent stem cells (hiPSCs) derived from AD patients can be differentiated and used for disease modeling. Here, we derived hiPSC from skin fibroblasts obtained from an AD patient carrying a L282F mutation in PSEN1. We transfected skin fibroblasts with episomal iPSC reprogramming vectors targeting human OCT4, SOX2, L-MYC, KLF4, NANOG, LIN28, and short hairpin RNA against TP53. Our hiPSC line, L282F-hiPSC, displayed typical stem cell characteristics with consistent expression of pluripotency genes and the ability to differentiation into the three germ layers...
September 28, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27788475/the-pharmacological-stimulation-of-nurr1-improves-cognitive-functions-via-enhancement-of-adult-hippocampal-neurogenesis
#19
Jin-Il Kim, Seong Gak Jeon, Kyoung Ah Kim, Yong Jun Kim, Eun Ji Song, Junghyun Choi, Kyu Jeung Ahn, Chong-Jin Kim, Ho Yeon Chung, Minho Moon, Hyunju Chung
The nuclear receptor related-1 (Nurr1) protein plays an important role in both the development of neural precursor cells (NPCs) and cognitive functions. Despite its relevance, the effects of Nurr1 on adult hippocampal neurogenesis have not been thoroughly investigated. Here we used RT-PCR, western blot, and immunocytochemistry to show that adult hippocampal NPCs abundantly express Nurr1. We then examined the effect of Nurr1 activation on adult hippocampal NPCs using amodiaquine (AQ), an anti-malarial drug that was recently discovered to be a Nurr1 agonist...
September 28, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27771498/ephrinb3-restricts-endogenous-neural-stem-cell-migration-after-traumatic-brain-injury
#20
Kirsty J Dixon, Jose Mier, Shyam Gajavelli, Alisa Turbic, Ross Bullock, Ann M Turnley, Daniel J Liebl
Traumatic brain injury (TBI) leads to a series of pathological events that can have profound influences on motor, sensory and cognitive functions. Conversely, TBI can also stimulate neural stem/progenitor cell proliferation leading to increased numbers of neuroblasts migrating outside their restrictive neurogenic zone to areas of damage in support of tissue integrity. Unfortunately, the factors that regulate migration are poorly understood. Here, we examine whether ephrinB3 functions to restrict neuroblasts from migrating outside the subventricular zone (SVZ) and rostral migratory stream (RMS)...
September 28, 2016: Stem Cell Research
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