Volume 2.38 | Sep 27

Hematopoiesis News 2.38, September 27, 2011
     In this issue: Publications | Industry News | Policy News | Events | Jobs
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Essential Roles for Pot1b in Hematopoietic Stem Cell Self-Renewal and Survival
In this study, scientists show that Pot1b plays an essential role in hematopoietic stem cell survival. [Blood] Abstract

PUBLICATIONS (Ranked by Impact Factor of the Journal)


Somatic Deletions of Genes Regulating MSH2 Protein Stability Cause DNA Mismatch Repair Deficiency and Drug Resistance in Human Leukemia Cells
Findings reveal a previously unrecognized mechanism whereby somatic deletions of genes regulating MSH2 degradation result in undetectable levels of MSH2 protein in leukemia cells, DNA mismatch repair deficiency and drug resistance. [Nat Med] Abstract | Press Release

Inhibition of Rac GTPase Signaling and Downstream Pro-Survival Bcl-2 Proteins as Combination Targeted Therapy in MLL-AF9 Leukemia

Using an in vivo gene targeting approach, researchers demonstrate that Rac2, but not Rac1, is critical to the initiation of acute myeloid leukemia in a retroviral expression model of MLL-AF9 leukemogenesis. [Blood] Abstract

Induction of Erythropoiesis Using Human Vascular Networks Genetically-Engineered for Controlled Erythropoietin Release
Here, investigators have genetically-engineered human blood-derived endothelial colony-forming cells to express erythropoietin (EPO) under control of a tetracycline-regulated system, and generated subcutaneous vascular networks capable of systemic EPO release in immunodeficient mice. [Blood] Abstract

Methionine Aminopeptidase 2 Is Required for Hematopoietic Stem Cell Initiation and Proliferation
Scientists investigated the role of methionine aminopeptidase II in hematopoiesis using zebrafish embryo and human umbilical cord blood models. [Blood] Abstract

Distinct Classes of c-Kit Activating Mutations Differ in their Ability to Promote RUNX1-ETO-Associated Acute Myeloid Leukemia
To test whether distinct subtypes of activating c-KIT mutations differ in their leukemogenic potential in association with RUNX1-ETO, researchers used a retroviral transduction/transplantation model to co-express RUNX1-ETO with either c-KitD814V or c-KitT417IΔ418-419 in murine hematopoietic stem/progenitor cells used to reconstitute lethally irradiated mice. [Blood] Abstract

Inducible Knockout of GRP78/BiP in the Hematopoietic System Suppresses Pten-Null Leukemogenesis and AKT Oncogenic Signaling
To directly elucidate the requirement of GRP78 in leukemogenesis, scientists created a biallelic conditional knockout mouse model of GRP78 and PTEN in the hematopoietic system. [Blood] Abstract

p38α Controls Erythroblast Enucleation and Rb Signaling in Stress Erythropoiesis
Here, investigators show that p38α, a mitogen-activated protein kinase, is required for erythroid enucleation. [Cell Res] Abstract

Targeted Disruption of the CCR5 Gene in Human Hematopoietic Stem Cells Stimulated by Peptide Nucleic Acids
The work suggests a therapeutic strategy for CCR5 knockout in hematopoietic stem cells from HIV-1-infected individuals, rendering cells resistant to HIV-1 and preserving immune system function. [Chem Biol] Abstract


Somatic SF3B1 Mutation in Myelodysplasia with Ring Sideroblasts
Researchers used massively parallel sequencing technology to identify somatically acquired point mutations across all protein-coding exons in the genome in 9 patients with low-grade myelodysplasia. [New Engl J Med] Abstract | Press Release

A Phase II Multicenter Study of Lenalidomide in Relapsed or Refractory Classical Hodgkin Lymphoma
In a multicenter phase II study, the efficacy of lenalidomide in relapsed or refractory classical Hodgkin lymphoma patients was evaluated at a dose of 25 mg on days 1-21 of a 28-day cycle. [Blood] Abstract

High BRE Expression Predicts Favorable Outcome in Adult Acute Myeloid Leukemia, in Particular Among MLL-AF9 Positive Patients
Investigators studied whether expression changes of over 1600 ubiquitination related genes correlated with clinical outcome in 525 adult acute myeloid leukemia patients. [Blood] Abstract



CELLECTA, INC. Receives Phase II NIH SBIR Grant to Screen for Therapeutic Targets for Blood Cancers
Cellecta, Inc. announced receipt of a two-year $1.85M Phase II NIH/NCI Small Business Innovation Research (SBIR) grant to identify novel drug targets which interact with small molecules specifically lethal to hematopoietic cells. [PR Web] Press Release

Multiple Myeloma Research Foundation Announces First Patient Enrolled in Landmark 1000-Patient Study, with Four World-Class Cancer Centers as First Clinical Sites
The Multiple Myeloma Research Foundation announced that the first patient has enrolled in a landmark 1000-patient study designed to uncover the molecular segments and variations of multiple myeloma. [Multiple Myeloma Research Foundation] Press Release

Universities and Science Minister to Launch Research Collaboration
The Minister of State for Universities and Science, David Willetts, officially launched a new phase in an innovative partnership between the North of England´s eight research intensive universities.  [The University of Sheffield] Press Release


AACR Releases Landmark Cancer Progress Report
The American Association for Cancer Research (AACR) unveiled the AACR Cancer Progress Report 2011 during a press conference at the National Press Club in Washington, D.C. [American Association for Cancer Research, United States] Press Release

NIH Announces 79 Awards to Encourage Creative Ideas in Science
The National Institutes of Health announced that it is awarding $143.8 million to challenge the status quo with innovative ideas that have the potential to propel fields forward and speed the translation of research into improved health for the American public. [National Institutes of Health, United States] Press Release

National Institutes of Health (United States)

Food and Drug Administration (United States)
Center for Biologics Evaluation and Research (United States)
European Medicines Agency (European Union)

Medicines and Healthcare Products Regulatory Agency (United Kingdom)

Therapeutic Goods Administration (Australia)


NEW Haematology Society of Australia and New Zealand – Australian & New Zealand Society of Blood Transfusion Annual Conference 2011
October 30-November 2, 2011
Sydney, Australia

Visit our events page to see a complete list of events in the hematopoietic community

Lab Technologist – Tissue Culture (STEMCELL Technologies)

Research and Development Technologist, hPSC Media (STEMCELL Technologies)

Scientist (iPSC) (STEMCELL Technologies)

Contract Assay Service Technologist (STEMCELL Technologies)

Postdoctoral Position in Hematopoietic Stem Cells and Signaling Transduction (University of Pennsylvania School of Medicine)

Director, Hematopoietic Stem Cell Transplant Program (University of Chicago)

Postdoctoral Position (Izmir Katip Celebi University)

Postdoctoral Positions in Stem Cells and Immunology (University of Connecticut)

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