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In this Backstory, Cell Stem Cell Senior Scientific Editor Jonathan Saxe presents a case study of two Cell Stem Cell papers published in 2018. Using the correspondences between authors, editors, and reviewers as tools, he provides broader insights and tips into navigating the journal's editorial consideration process.
In 2018, the ISSCR underwent a strategic planning process to identify current priorities and plan for future initiatives. Key recommendations will help the society better serve its members and fulfill its mission of promoting excellence in stem cell science and applications to human health.
The drivers of aging in the hematopoietic system remain incompletely understood. In this issue of Cell Stem Cell, Ho et al. (2019) report that functional switching of β-adrenergic nerve signaling underlies remodeling of stem cell niches, driving age-associated alterations in hematopoiesis.
Special report: Summary of the first meeting of African Blood and Marrow Transplantation (AfBMT) group, Casablanca, Morocco, April 19-21, 2018 held under the auspices of the Worldwide Network for Blood and Marrow Transplantation (WBMT).
The first meeting of the African Blood and Marrow Transplantation (AfBMT) was held in Casablanca from April 19, 2018 to April 21, 2018, with the aim of fostering hematopoietic stem cell transplantation (HSCT) activity in Africa. Out of the 54 African countries, HSCT is available only in six (Algeria, Egypt, Morocco, Nigeria, South Africa, and Tunisia). During this meeting, African teams and international experts from the Worldwide Network for Blood and Marrow Transplantation (WBMT) gathered to share their e...
An estimated 70-90% of all cancers are linked to exposure to environmental risk factors. In parallel, the number of stem cells in a tissue has been shown to be a strong predictor of risk of developing cancer in that tissue. Tumors themselves are characterized by an acquisition of "stem cell" characteristics, and a growing body of evidence points to tumors themselves being sustained and propagated by a stem cell-like population. Here, we review our understanding of the interplay between environmental exposur...
Calcium ions (Ca), ubiquitous signaling and second messenger molecules, are communicators for the transmission of messages in numerous cell functions. In this issue of Cell Stem Cell, Luchsinger et al. (2019) provide evidence through the use of transplantation and mechanistic studies for the finding that, "Harnessing Hematopoietic Stem Cell Low Intracellular Calcium Improves Their Maintenance In Vitro."
In this issue of Cell Stem Cell, Johansson et al. (2019) find evolutionarily conserved regulation of Wnt signaling through Ral GTPases. These GTPases promote internalization of Wnt receptor complexes and play a critical role in intestinal stem cell function in flies and mice.
In this issue of Cell Stem Cell, Xu et al. (2019) demonstrate that editing iPSCs' major histocompatibility antigens may potentially provide a small set of universally compatible stem cell lines for therapies. However, these modifications may result in patient minor histocompatibility responses and deficiencies in their T cell response repertoire to infection and cancer.
Transcriptional profiling is a powerful tool commonly used to benchmark stem cells and their differentiated progeny. As the wealth of stem cell data builds in public repositories, we highlight common data traps, and review approaches to combine and mine this data for new cell classification and cell prediction tools. We touch on future trends for stem cell profiling, such as single-cell profiling, long-read sequencing, and improved methods for measuring molecular modifications on chromatin and RNA that brin...
Evidence suggests that hematopoietic progenitor cells self-replenish in situ over prolonged time frames, centering the question on the identity and source of growth factors maintaining HPC fidelity. In this issue of Cell Stem Cell, Comazzetto et al. (2019) suggest that normal stem and progenitor function relies on stem cell factor provided by distinct cellular sources.
The molecular basis for the neural stem cell quiescence-to-activation transition has become an important focus in the study of adult neurogenesis. Recently in Cell, Kalamakis et al. (2019) show that aged neural stem cells face greater barriers to exiting quiescence, imposed by the niche through inflammation and altered Wnt signaling.
Tissue-resident immune cells with potent sensing and effector functions are well-placed to fundamentally aid tissue homeostasis via crosstalk with stem cells. In this issue of Cell Stem Cell, Wang et al. (2019) identify a dermis-resident TREM2+ macrophage subpopulation that promotes hair follicle stem cell quiescence via cytokine-mediated JAK-STAT signaling.
Human pluripotent stem cells (hPSCs) acquire changes at the genomic level upon proliferation and differentiation (Peterson and Loring, 2014). Studies from International Stem Cell Initiative and independent laboratories identified a copy number variant (CNV) in hES cell lines displaying a normal karyotype, which provided a selective advantage to hES cells in culture. In our laboratory we have identified variant H9-hESC (derived from H9-hESC) with normal karyotype, pluripotency expression, differentiation pro...
Previous work demonstrating the importance of stem cell metabolism in regulating development ignited a debate on how intrinsic versus extrinsic conditions influence metabolic programming of epigenetics. In this issue of Cell Stem Cell, Cornacchia et al. show that exogenous lipids regulate an acetyl-CoA-dependent switch to influence the intrinsic pluripotent state of hPSCs.
Human pluripotent stem cells (PSCs) could potentially provide a potentially unlimited supply of T cells. In this issue of Cell Stem Cell, Montel-Hagen et al. (2019) take advantage of a three-dimensional mouse stromal cell-based system that combines mesoderm specification with organoid-induced hematopoietic differentiation to enable commitment, selection, and maturation of conventional human T cells.
An example of the peer review process, for "Comparative Analysis and Refinement of Human PSC-Derived Kidney Organoid Differentiation with Single-Cell Transcriptomics" (Wu et al., 2018), is presented herein.
Recent advances in stem cell biology present significant opportunities to advance clinical applications of stem cell-based therapies for spinal cord injury (SCI). In this review, the authors critically analyze the basic science and translational evidence that supports the use of various stem cell sources, including induced pluripotent stem cells, oligodendrocyte precursor cells, and mesenchymal stem cells. They subsequently explore recent advances in stem cell biology and discuss ongoing clinical translatio...
The stem cell mobilization agent plerixafor significantly improves CD34 stem cell procurement in patients with multiple myeloma undergoing autologous stem cell transplant. We compared mobilization success rates and costs of two regimens of plerixafor administration: pre-emptive (P-PL, initiated the evening prior to the first day of stem cell collection) and standard (S-PL, initiated the evening prior to the second day of stem cell collection in the event of inadequate collection on the first day).
High mammographic breast density is a strong, well-established breast cancer risk factor. Whether stem cells may explain high breast cancer risk in dense breasts is unknown. We investigated the association between breast density and breast cancer risk by the status of stem cell markers CD44, CD24, and ALDH1A1 in the tumor.
Mesenchymal stem cells (MSCs) participate in the regeneration of tissue lesions induced by antimetabolite chemotherapy; however, the influence of this class of anti-cancer compounds on the stem cells remains largely unknown.
There are large knowledge gaps regarding how to control stem cells growth and differentiation. The limitations of currently available technologies, such as growth factors and/or gene therapies has led to the search of alternatives. We explore here how a cell's epigenome influences determination of cell type, and potential applications in tissue engineering. A prevalent epigenetic modification is the acetylation of DNA core histone proteins. Acetylation levels heavily influence gene transcription. Histone de...