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https://www.readbyqxmd.com/read/28196146/chemotherapy-induces-adaptive-drug-resistance-and-metastatic-potentials-via-phenotypic-cxcr4-expressing-cell-state-transition-in-ovarian-cancer
#1
Hyun Hee Lee, Vanessa Bellat, Benedict Law
Ovarian cancer (OVC) patients who receive chemotherapy often acquire drug resistance within one year. This can lead to tumor reoccurrence and metastasis, the major causes of mortality. We report a transient increase of a small distinctive CXCR4High/CD24Low cancer stem cell population (CXCR4High) in A2780 and SKOV-3 OVC cell lines in response to cisplatin, doxorubicin, and paclitaxel, treatments. The withdrawal of the drug challenges reversed this cell-state transition. CXCR4High exhibits dormancy in drug resistance and mesenchymal-like invasion, migration, colonization, and tumor formation properties...
2017: PloS One
https://www.readbyqxmd.com/read/28192422/identification-of-quiescent-and-spatially-restricted-mammary-stem-cells-that-are-hormone-responsive
#2
Nai Yang Fu, Anne C Rios, Bhupinder Pal, Charity W Law, Paul Jamieson, Ruijie Liu, François Vaillant, Felicity Jackling, Kevin He Liu, Gordon K Smyth, Geoffrey J Lindeman, Matthew E Ritchie, Jane E Visvader
Despite accumulating evidence for a mammary differentiation hierarchy, the basal compartment comprising stem cells remains poorly characterized. Through gene expression profiling of Lgr5(+) basal epithelial cells, we identify a new marker, Tetraspanin8 (Tspan8). Fractionation based on Tspan8 and Lgr5 expression uncovered three distinct mammary stem cell (MaSC) subsets in the adult mammary gland. These exist in a largely quiescent state but differ in their reconstituting ability, spatial localization, and their molecular and epigenetic signatures...
February 13, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28108933/modelling-genome-wide-topological-associating-domains-in-mouse-embryonic-stem-cells
#3
REVIEW
Y Zhan, L Giorgetti, G Tiana
Chromosome conformation capture (3C)-based techniques such as chromosome conformation capture carbon copy (5C) and Hi-C revealed that the folding of mammalian chromosomes is highly hierarchical. A fundamental structural unit in the hierarchy is represented by topologically associating domains (TADs), sub-megabase regions of the genome within which the chromatin fibre preferentially interacts. 3C-based methods provide the mean contact probabilities between chromosomal loci, averaged over a large number of cells, and do not give immediate access to the single-cell conformations of the chromatin fibre...
January 20, 2017: Chromosome Research
https://www.readbyqxmd.com/read/28094826/response-to-dittrich-et-al-non-embryo-destructive-extraction-of-pluripotent-embryonic-stem-cells-overlooked-legal-prohibitions-professional-legal-consequences-and-inconsistencies-in-patent-law
#4
REVIEW
T Faltus, U Storz
The publication of "Non-embryo-destructive Extraction of Pluripotent Embryonic Stem Cells: Implications for Regenerative Medicine and Reproductive Medicine" by Dittrich et al. in Geburtshilfe und Frauenheilkunde 2015; 75: 1239-1242 1 describes various possibilities which could result from the non-embryo-destructive extraction of embryonic stem cells from human blastocysts. But implementing this method is more problematic, both legally and ethically, than the authors have represented it to be and is illegal in Germany...
December 2016: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/28042168/reply-to-response-to-dittrich-et-al-non-embryo-destructive-extraction-of-pluripotent-embryonic-stem-cells-overlooked-legal-prohibitions-professional-legal-consequences-and-inconsistencies-in-patent-law
#5
https://www.readbyqxmd.com/read/27976982/patent-eligibility-of-stem-cells-in-europe-where-do-we-stand-after-8-years-of-case-law
#6
Ulrich Storz, Timo Faltus
Since 2006, some of the highest ranking European Courts have issued decisions related to the patent eligibility of human embryonic stem cells. The question of patent eligibility of human embryonic stem cells remains, however, still erratic, at least in some aspects. This article will give a short comprehensive overview of the case history, and discuss questions still unsolved.
January 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/27933781/structure-and-function-of-the-hepatitis-c-virus-envelope-glycoproteins-e1-and-e2-antiviral-and-vaccine-targets
#7
Holly Freedman, Michael R Logan, John Lok Man Law, Michael Houghton
The hepatitis C virus (HCV) envelope glycoproteins E1 and E2 are critical in viral attachment and cell fusion, and studies of these proteins may provide valuable insights into their potential uses in vaccines and antiviral strategies. Progress has included elucidating the crystal structures of portions of their ectodomains, as well as many other studies of hypervariable regions, stem regions, glycosylation sites, and the participation of E1/E2 in viral fusion with the endosomal membrane. The available structural data have shed light on the binding sites of cross-neutralizing antibodies...
November 11, 2016: ACS Infectious Diseases
https://www.readbyqxmd.com/read/27855949/-general-and-ethical-considerations-for-the-informed-consent-process-guidelines-from-the-francophone-society-of-bone-marrow-transplantation-and-cellular-therapy-sfgm-tc
#8
Jean-Baptiste Thibert, Alice Polomeni, Ibrahim Yakoub-Agha, Dominique Bordessoule
Informed consent is not restricted to clinical research and must be applied to high-risk care such as hematopoietic stem cell transplantation. If standardized informed consent might improve inequalities in medical practices between different transplantation centers, it is strongly recommended that it be adapted with an honest dialogue between physicians and patients and physicians and donors. In an attempt to harmonize clinical practices among French hematopoietic stem cell transplantation centers, the Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC) held its sixth annual workshop series in September 2015 in Lille...
November 2016: Bulletin du Cancer
https://www.readbyqxmd.com/read/27842861/-information-and-consent-forms-for-hematopoietic-stem-cell-transplantation-donors-and-recipients-guidelines-from-the-franchophone-society-of-bone-marrow-transplantation-and-cellular-therapy-sfgm-tc
#9
Bénédicte Bruno, Jean-Baptiste Thibert, Nelly Bancillon, Anna Desbos, Abir Fawaz, Isabelle Fournier, Carole Genty, Dominique Issarni, Sandrine Leveille, Christelle Premel, Alice Polomeni, Myriam Renault, Sylvie Tarillon, Anne Wallart, Ibrahim Yakoub-Agha, Dominique Bordessoule
Within the context of the SFGM-TC's 6th workshop series on the harmonization of clinical practices, our workshop proposes a standardization of the informed consent process for hematopoietic stem cell donors and recipients leading up to an autologous or allogenic transplantation. All informed consent was for bone marrow or peripheral stem cell donors, and mononuclear/lymphocyte donors according to usual procedures. The informed consent for autologous and allogenic related or unrelated adults and pediatric transplantation patients have been included...
November 2016: Bulletin du Cancer
https://www.readbyqxmd.com/read/27824280/the-combined-effect-of-substrate-stiffness-and-surface-topography-on-chondrogenic-differentiation-of-mesenchymal-stem-cells
#10
Yingnan Wu, Zheng Yang, Jaslyn Bee Khuan Law, Ai Yu He, Azlina A Abbas, Vinitha Denslin, Tunku Kamarul, James H P Hui, Eng Hin Lee
Stem cell differentiation is guided by contact with the physical microenvironment, influence by both topography and mechanical properties of the matrix. In this study, the combined effect of substratum nano-topography and mechanical stiffness in directing mesenchymal stem cell (MSC) chondrogenesis was investigated. Three polyesters of varying stiffness were thermally imprinted to create nano-grating or pillar patterns of the same dimension. The surface of the nano-patterned substrate was coated with chondroitin sulfate (CS) to provide an even surface chemistry, with cell-adhesive and chondro-inductive properties, across all polymeric substrates...
January 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27729213/amp-activated-protein-kinase-has-diet-dependent-and-independent-roles-in-drosophila-oogenesis
#11
Kaitlin M Laws, Daniela Drummond-Barbosa
Multiple aspects of organismal physiology influence the number and activity of stem cells and their progeny, including nutritional status. Previous studies demonstrated that Drosophila germline stem cells (GSCs), follicle stem cells (FSCs), and their progeny sense and respond to diet via complex mechanisms involving many systemic and local signals. AMP-activated protein kinase, or AMPK, is a highly conserved regulator of energy homeostasis known to be activated under low cellular energy conditions; however, its role in the ovarian response to diet has not been investigated...
December 1, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27705770/a-tensegrity-model-of-cell-reorientation-on-cyclically-stretched-substrates
#12
Guang-Kui Xu, Bo Li, Xi-Qiao Feng, Huajian Gao
Deciphering the mechanisms underlying the high sensitivity of cells to mechanical microenvironments is crucial for understanding many physiological and pathological processes, e.g., stem cell differentiation and cancer cell metastasis. Here, a cytoskeletal tensegrity model is proposed to study the reorientation of polarized cells on a substrate under biaxial cyclic deformation. The model consists of four bars, representing the longitudinal stress fibers and lateral actin network, and eight strings, denoting the microfilaments...
October 4, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27632389/deregulation-of-vital-mitotic-kinase-phosphatase-signaling-in-hematopoietic-stem-progenitor-compartment-leads-to-cellular-catastrophe-in-experimental-aplastic-anemia
#13
Ritam Chatterjee, Sukalpa Chattopadhyay, Sujata Law
Aplastic anemia, the paradigm of bone marrow failure, is characterized by pancytopenic peripheral blood and hypoplastic bone marrow. Among various etiologies, inappropriate use of DNA alkylating drugs like cyclophosphamide and busulfan often causes the manifestation of the dreadful disease. Cell cycle impairment in marrow hematopoietic stem/progenitor compartment together with cellular apoptosis has been recognized as culpable factors behind aplastic pathophysiologies. However, the intricate molecular mechanisms remain unrevealed till date...
November 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27605883/prevention-and-management-of-hepatitis-b-virus-reactivation-in-patients-with-hematological-malignancies-treated-with-anticancer-therapy
#14
REVIEW
Man Fai Law, Rita Ho, Carmen K M Cheung, Lydia H P Tam, Karen Ma, Kent C Y So, Bonaventure Ip, Jacqueline So, Jennifer Lai, Joyce Ng, Tommy H C Tam
Hepatitis due to hepatitis B virus (HBV) reactivation can be severe and potentially fatal, but is preventable. HBV reactivation is most commonly reported in patients receiving cancer chemotherapy, especially rituximab-containing therapy for hematological malignancies and those receiving stem cell transplantation. All patients with hematological malignancies receiving anticancer therapy should be screened for active or resolved HBV infection by blood tests for hepatitis B surface antigen (HBsAg) and antibody to hepatitis B core antigen (anti-HBc)...
July 28, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27547930/-legal-framework-of-autologous-fat-usage-in-point-of-care-treatments-in-plastic-and-aesthetic-surgery-risks-of-criminal-prosecution-and-infringement-of-medical-law-due-to-pharmaceutical-regulations
#15
T Faltus
The use of autologous fat, especially for (stem) cell-assisted lipotransfer in plastic and aesthetic surgery, has regularly been regarded as the manufacture and application of so called Advanced Therapy Medicinal Products (ATMP). However, the in-house production of such pharmaceuticals at the point-of-care (PoC) in the surgeon's practice is not permitted without an official manufacturing license. Therefore, before beginning such treatments, a pharmaceutical manufacturing license has to be granted to the surgeon to avoid criminal prosecution and negative consequences due to infringement of professional regulations...
August 2016: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/27547444/regenerative-medicine-in-china-main-progress-in-different-fields
#16
REVIEW
Biao Cheng, Shu-Liang Lu, Xiao-Bing Fu
Regenerative medicine (RM) is an emerging interdisciplinary field of research and China has developed the research quickly and impressed the world with numerous research findings in stem cells, tissue engineering, active molecules and gene therapy. Important directions are induced differentiation of induced pluripotent stem and embryo stem cells as well as somatic stem cell differentiation potential and their application in trauma, burns, diseases of aging and nerve regeneration. The products ActivSkin and bone repair scaffolds have been approved and are applied in the clinic, and similar products are being studied...
2016: Military Medical Research
https://www.readbyqxmd.com/read/27496493/national-hematopoietic-stem-cells-transplant-registry-in-poland-nationwide-internet-reporting-system-and-results
#17
A Łęczycka, M Dudkiewicz, J Czerwiński, P Malanowski, J Żalikowska-Hołoweńko, R Danielewicz
History of hematopoietic stem cell transplantations in Poland begins in early 1980s; the 1st bone marrow allotransplantation was performed in 1983 in the Central Clinical Hospital of the Military Medical Academy in Warsaw. Following years brought the 1st autologous stem cell transplantations. Ten years later, unrelated bone marrow transplantation was performed for the 1st time by the team of the Hematology and Blood and Marrow Transplantation Unit in Katowice. Since then, hematopoietic stem cell transplantation developed to be standard procedure and one of the most important therapies applied in leukemia treatment...
June 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27496415/a-cell-graft-or-a-drug-legal-and-practical-aspects-of-somatic-cells-application-in-graft-versus-host-disease-experimental-treatment-the-polish-experience
#18
I A Uhrynowska-Tyszkiewicz, E Olender, A Kaminski
INTRODUCTION: Allogeneic hematopoietic stem and progenitor cell (HSPC) transplantation and organ transplantation are well-established treatments for different conditions. Graft versus host disease (GvHD) is a major complication in both methods. There has been a rapid increase in the application of nonhematopoietic somatic cells, such as mesenchymal stem cells and regulatory T cells in GvHD experimental therapy. According to current European Union (EU) law, human cells intended for human application can be considered either as cell grafts or as advanced therapy medicinal products (ATMPs)...
June 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27472826/a-pioneer-experience-in-malaysia-on-in-house-radio-labelling-of-131-i-rituximab-in-the-treatment-of-non-hodgkin-s-lymphoma-and-a-case-report-of-high-dose-131-i-rituximab-beam-conditioning-autologous-transplant
#19
Jew Win Kuan, Chiong Soon Law, Xiang Qi Wong, Ching Tiong Ko, Zool Hilmi Awang, Lee Ping Chew, Kian Meng Chang
Radioimmunotherapy is an established treatment modality in Non-Hodgkin's lymphoma. The only two commercially available radioimmunotherapies - (90)Y-ibritumomab tiuxetan is expensive and (131)I-tositumomab has been discontinued from commercial production. In resource limited environment, self-labelling (131)I-rituximab might be the only viable practical option. We reported our pioneer experience in Malaysia on self-labelling (131)I-rituximab, substituting autologous haematopoietic stem cell transplantation (HSCT) and a patient, the first reported case, received high dose (131)I-rituximab (6000MBq/163mCi) combined with BEAM conditioning for autologous HSCT...
October 2016: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/27348830/the-social-framework-surrounding-the-development-of-regenerative-medicine-in-japan
#20
Eisuke Nakazawa, Yoshiyuki Takimoto, Akira Akabayashi
In 2014, the Japanese government amended the laws concerning regenerative medicine. This reform aimed to contribute to the appropriate promotion of regenerative medicine and new drug discovery for intractable diseases using stem cells. It also helped restrict stem cell tourism, that is, provision of stem cell therapy of unclear efficacy and safety to tourists from abroad, and its relaxed regulations may even lead to the resolution of the drug lag problem. Stem cell medicine is positioned as a part of a national growth strategy that requires cooperation among the industry, government, healthcare field, and academia...
July 2016: Cambridge Quarterly of Healthcare Ethics: CQ: the International Journal of Healthcare Ethics Committees
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