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Stem cell research

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https://www.readbyqxmd.com/read/27914013/inhibitory-effect-of-homocysteine-on-rat-neural-stem-cell-growth-in-vitro-is-associated-with-reduced-protein-levels-and-enzymatic-activities-of-aconitase-and-respiratory-complex-iii
#1
Xu-Mei Zhang, Ya-Qian Zhao, Hai Yan, Huan Liu, Guo-Wei Huang
Increased blood plasma concentration of the sulphur amino acid homocysteine (Hcy) is considered as an independent risk factor of the neurodegenerative diseases. However, the detailed molecular mechanisms by which Hcy leads to neurotoxicity have yet to be clarified. Recent research has suggested that neurotoxicity of Hcy may involve negative regulation of neural stem cell (NSC) proliferation. In the current study, primary NSCs were isolated from neonatal rat brain hippocampus and the inhibition in cell growth was observed after exposure to l50 μM and 500 μM L-Hcy...
December 2, 2016: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/27913520/myeloma-management-of-the-newly-diagnosed-high-risk-patient
#2
Angela Dispenzieri
Although there have been many definitions for high-risk (HR) myeloma, most recent consensus for classifying risk in patients with newly diagnosed multiple myeloma (NMM) comes from the International Myeloma Working Group. This recently published revised International Staging System includes del(17p) or t(4;14) by fluorescence in situ hybridization, β-2 microglobulin, albumin, and lactate dehydrogenase. These elements should be captured in all NMM patients. The optimal treatments for HR myeloma have not been fully worked out; therefore, these patients should be considered for clinical trials...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913465/aplastic-anemia-and-clonal-evolution-germ-line-and-somatic-genetics
#3
Akiko Shimamura
Clonal progression to myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML) remains a dreaded complication for a subset of patients with bone marrow failure (BMF). Recognizing risk factors for the development of MDS or AML would inform individualized treatment decisions and identify patients who may benefit from early or upfront hematopoietic stem cell transplantation. Now that next-generation DNA sequencing is available in the clinical laboratory, research has focused on the implications of germ line and somatic mutations for diagnosing and monitoring patients with BMF...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27912759/intestinal-dysbiosis-and-allogeneic-hematopoietic-progenitor-cell-transplantation
#4
REVIEW
Vikram M Raghunathan, Iris Sheng, Seah H Lim
The intestinal microbiota is a diverse and dynamic ecosystem that is increasingly understood to play a vital role in human health. Hematopoietic stem cell transplant recipients undergo prolonged exposure to antimicrobials, chemotherapeutic agents, and immunosuppressants, resulting in profound shifts in the gut microbiome. A growing body of research has revealed the ways in which these microbiologic shifts shape immune modulation, affecting susceptibility to infections and graft-versus-host disease, the two major post-transplant complications in this population...
December 3, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27912090/advances-in-zika-virus-research-stem-cell-models-challenges-and-opportunities
#5
REVIEW
Guo-Li Ming, Hengli Tang, Hongjun Song
The re-emergence of Zika virus (ZIKV) and its suspected link with various disorders in newborns and adults led the World Health Organization to declare a global health emergency. In response, the stem cell field quickly established platforms for modeling ZIKV exposure using human pluripotent stem cell-derived neural progenitors and brain organoids, fetal tissues, and animal models. These efforts provided significant insight into cellular targets, pathogenesis, and underlying biological mechanisms of ZIKV infection as well as platforms for drug testing...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27910816/the-stimulatory-effect-of-silica-nanoparticles-on-osteogenic-differentiation-of-human-mesenchymal-stem-cells
#6
Xing Yang, Yuanyuan Li, Xujie Liu, Qianli Huang, Wei He, Ranran Zhang, Qingling Feng, Dafna Benayahu
Silica-based materials with favourable biocompatibility are generally considered as excellent candidates for applications in biomedical fields. However, previous researches mainly focused on the safety of silica-based materials, their effects on osteogenic differentiation of human mesenchymal stem cells (hMSCs) still need further investigations. In this study, core-shell fluorescent silica nanoparticles (silica NPs) with three different sizes (S1 ~ 50 nm, S2 ~ 200 nm, S3 ~ 400 nm, respectively) were prepared according to the Stöber method...
December 2, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27909533/patient-specific-induced-pluripotent-stem-cell-derived-cardiomyocytes-for-drug-development-and-screening-in-catecholaminergic-polymorphic-ventricular-tachycardia
#7
REVIEW
Ben Jehuda Ronen, Barad Lili
Catecholaminergic polymorphic ventricular tachycardia (CPVT), an inherited arrhythmia often leading to sudden cardiac death in children and young adults, is characterized by polymorphic/bidirectional ventricular tachycardia induced by adrenergic stimulation associated with emotionally stress or physical exercise. There are two forms of CPVT: 1. CPVT1 is caused by mutations in the RYR2 gene, encoding for ryanodine receptor type 2. CPVT1 is the most common form of CPVT in the population, and is inherited by a dominant mechanism...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908220/pluripotent-stem-cells-the-last-10-years
#8
Erin A Kimbrel, Robert Lanza
Pluripotent stem cells (PSCs) can differentiate into virtually any cell type in the body, making them attractive for both regenerative medicine and drug discovery. Over the past 10 years, technological advances and innovative platforms have yielded first-in-man PSC-based clinical trials and opened up new approaches for disease modeling and drug development. Induced PSCs have become the foremost alternative to embryonic stem cells and accelerated the development of disease-in-a-dish models. Over the years and with each new discovery, PSCs have proven to be extremely versatile...
December 2, 2016: Regenerative Medicine
https://www.readbyqxmd.com/read/27908206/the-role-of-mesenchymal-stem-cells-in-oncology-and-regenerative-medicine
#9
Maliha Khan, Syeda Ezze Rukhshan Adil, Amanda L Olson
Mesenchymal stem cells (MSCs) have long been used as therapeutic agents in disease affecting various organ systems. However, MSCs are fast emerging as promising anticancer agents which have the potential to treat a number of different cancer types, including glioblastoma and metastatic breast, ovarian and hepatic carcinoma. The ability of MSC to migrate directly into the tumor microenvironment and to produce IFN-α and -β makes this possible. However, the possibility of MSC undergoing either malignant transformation or transformation into protumorigenic fibroblasts currently limits their role in clinical use...
December 2, 2016: Future Oncology
https://www.readbyqxmd.com/read/27906795/factors-determining-the-outcome-of-hematopoietic-stem-cell-transplantation-in-patients-with-acute-lymphoblastic-leukemia-at-king-faisal-specialist-hospital-and-research-center-riyadh-saudi-arabia
#10
Suleimman Al-Sweedan, Amal Al-Seraihy, Ali Al-Ahmari, Abdullah Al-Jefri, Viqaruddin Mohammed, Rafat Jafri, Khawar Siddiqui, Mouhab Ayas
Medical records of 82 patients with acute lymphoblastic leukemia (ALL) who underwent hematopoietic cell transplantation (HCT) at our institution from 2005 to 2011 were reviewed. Forty-five patients were male (54.8%). The median age at HCT was 7.46 years (range, 0.98 to 14.31 y), the median time to HCT after diagnosis was 12.56 months. Ten patients were below the age of 1 year (12%). All patients were in complete remission at the time of HCT. In 83 transplants, 64 patients received HCT from human leukocyte antigen-identical-related donors and 19 from other donors...
November 30, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27905428/stem-cells-and-interspecies-chimaeras
#11
Jun Wu, Henry T Greely, Rudolf Jaenisch, Hiromitsu Nakauchi, Janet Rossant, Juan Carlos Izpisua Belmonte
Chimaeras are both monsters of the ancient imagination and a long-established research tool. Recent advances, particularly those dealing with the identification and generation of various kinds of stem cells, have broadened the repertoire and utility of mammalian interspecies chimaeras and carved out new paths towards understanding fundamental biology as well as potential clinical applications.
December 1, 2016: Nature
https://www.readbyqxmd.com/read/27904501/human-amniotic-epithelial-cells-combined-with-silk-fibroin-scaffold-in-the-repair-of-spinal-cord-injury
#12
Ting-Gang Wang, Jie Xu, Ai-Hua Zhu, Hua Lu, Zong-Ning Miao, Peng Zhao, Guo-Zhen Hui, Wei-Jiang Wu
Treatment and functional reconstruction after central nervous system injury is a major medical and social challenge. An increasing number of researchers are attempting to use neural stem cells combined with artificial scaffold materials, such as fibroin, for nerve repair. However, such approaches are challenged by ethical and practical issues. Amniotic tissue, a clinical waste product, is abundant, and amniotic epithelial cells are pluripotent, have low immunogenicity, and are not the subject of ethical debate...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27903969/targeting-tissue-factor-as-a-novel-therapeutic-oncotarget-for-eradication-of-cancer-stem-cells-isolated-from-tumor-cell-lines-tumor-xenografts-and-patients-of-breast-lung-and-ovarian-cancer
#13
Zhiwei Hu, Jie Xu, Jijun Cheng, Elizabeth McMichael, Lianbo Yu, William E Carson Iii
Targeting cancer stem cell (CSC) represents a promising therapeutic approach as it can potentially fight cancer at its root. The challenge is to identify a surface therapeutic oncotarget on CSC. Tissue factor (TF) is known as a common yet specific surface target for cancer cells and tumor neovasculature in several solid cancers. However, it is unknown if TF is expressed by CSCs. Here we demonstrate that TF is constitutively expressed on CD133 positive (CD133+) or CD24-CD44+ CSCs isolated from human cancer cell lines, tumor xenografts from mice and breast tumor tissues from patients...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27900882/latest-developments-in-the-field-of-stem-cell-research-and-regenerative-medicine-compiled-from-publicly-available-information-and-press-releases-from-nonacademic-institutions-1-30-september-2016
#14
https://www.readbyqxmd.com/read/27900877/mesenchymal-stem-cells-a-promising-tool-for-targeted-gene-therapy-of-endometriosis
#15
Aghila Rani Koippallil Gopalakrishnan, Uday Kishore, Taruna Madan
Endometriosis is a leading, benign gynecological disorder around the world. Last few years have witnessed tremendous growth in the field of endometriosis and endometrial stem-cell research. Despite advancements in the biology and pathology of endometriosis, disease recurrence is still an enigma. Gene therapy holds promise in treating many pathologic conditions including endometriosis. Mesenchymal stem cells (MSCs) serve as ideal candidates for regenerative medicine and cell-based therapies. Owing to their specificity to the endometrium, residing endometrial MSC populations could be utilized as ideal candidates for targeting endometrial disorders...
November 30, 2016: Regenerative Medicine
https://www.readbyqxmd.com/read/27900603/enteropathy-associated-t-cell-lymphoma
#16
REVIEW
Sarah Ondrejka, Deepa Jagadeesh
Enteropathy-associated T-cell lymphoma is a rare neoplasm with uniformly aggressive features that arises from intestinal T-cells. There is strong evidence supporting its association as a dire complication of celiac disease. The clinical presentation can vary from malabsorption and abdominal pain to an acute abdominal emergency. Originally, it was divided into types I and II in World Health Organization (WHO) classification schemes, reflective of epidemiology and differences in clinicopathologic features. The debate over the degree of separation of the two types is ongoing as new data emerges regarding the pathogenetics...
November 29, 2016: Current Hematologic Malignancy Reports
https://www.readbyqxmd.com/read/27900341/subventricular-zone-associated-glioblastoma-a-call-for-translational-research-to-guide-clinical-decision-making
#17
Andrew W Smith, Bhupesh Parashar, A Gabriella Wernicke
Glioblastoma (GBM) is both the most common and the most devastating primary cancer of the central nervous system, with an expected overall survival in most patients of about 14 months. Despite extensive research, outcomes for GBM have been largely unchanged since the introduction of temozolomide in 2005. We believe that in order to achieve a breakthrough in therapeutic management, we must begin to identify subtypes of GBM, and tailor treatment to best target a particular tumor's vulnerabilities. Our group has recently produced an examination of the clinical outcomes of radiation therapy directed at tumors that contact the subventricular zone (SVZ), the 3-5 mm lateral border of the lateral ventricles that contains the largest collection of neural stem cells in the adult brain...
2016: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/27900058/effect-of-surgical-wound-fluids-after-intraoperative-electron-radiotherapy-on-the-cancer-stem-cell-phenotype-in-a-panel-of-human-breast-cancer-cell-lines
#18
Karolina Zaleska, Wiktoria Maria Suchorska, Anna Przybyła, Dawid Murawa
The wound healing process after surgery alters the area surrounding the original tumor and around the scar, and the modified microenvironment is more favorable for tumor recurrence. Intraoperative radiotherapy (IORT) is one of the more novel strategies in breast cancer (BC) treatment. Irradiation during surgery has effects on the tumor microenvironment, abrogating the proliferative cascade induced by surgical wound healing. The aim of the present study was to determine the effect of surgical wound fluids from IOERT treatment (RT-WF) compared with wound fluids from conservative-breast surgery only (WF) on the cancer stem cell phenotype in a panel of BC cell lines...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899803/novel-targets-in-the-treatment-of-chronic-graft-versus-host-disease
#19
REVIEW
A Im, F T Hakim, S Z Pavletic
Despite advances that have improved survival after allogeneic hematopoietic stem cell transplantation (HCT), chronic graft-versus-host disease (GVHD) remains a leading cause of late morbidity and mortality after transplant. Current treatment options show limited efficacy in steroid-refractory disease, and there exists a paucity of robust data to guide management decisions. Lack of United States Food and Drug Administration (FDA) or European Medicines Agency (EMA) approved agents in GVHD underscore the importance of developing novel therapies...
November 30, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27899238/goat-umbilical-cord-cells-are-permissive-to-small-ruminant-lentivirus-infection-in-vitro
#20
Gabrielle R Martins, Rebeca C Marinho, Rosivaldo Q Bezerra Junior, Antoniel de O Alves, Lilia M C Câmara, Luiz C Albuquerque-Pinto, Maria F da S Teixeira
Small ruminant lentiviruses isolated from peripheral blood leukocytes and target organs can be propagated in vitro in fibroblasts derived from goat synovial membrane cells. These cells are obtained from tissues collected from embryos or fetuses and are necessary for the establishment of the fibroblast primary culture. A new alternative type of host cells, derived from goat umbilical cord, was isolated and characterized phenotypically with its main purpose being to obtain cell monolayers that could be used for the diagnosis and isolation of small ruminant lentiviruses in cell culture...
November 19, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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