Showing 8 ideas for tag "regenerative"

Goal 1: Promote Human Health

Host and environmental factors effect on transplantation biology and regenerative medicine

How does inflammation and cell injury induce the immune system during transplant rejection? How do we control immune responses to enable cell- and tissue-regenerative strategies?
• How does inflammation and cell injury induce the immune system during transplant rejection?
• How do we control immune responses to enable cell and tissue regenerative strategies?
• How do we use iPS cell based and gene editing based therapies... more »

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Compelling Question (CQ)

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Treatment of human diseases

Feasibility and challenges of addressing this CQ or CC

Facilitated by progress in genome editing, stem cell biology, immunology

Name of idea submitter and other team members who worked on this idea NHLBI Staff

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48 up votes
14 down votes
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Goal 2: Reduce Human Disease

Stem Cell Biology

There is a need to develop an artificial and functional hematopoietic stem cell (HSC) niche that allows for the expansion of repopulating HSCs.

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Critical Challenge (CC)

Details on the impact of addressing this CQ or CC

Methods to expand hematopoietic stem cells have continued to be examined extensively because stem cell numbers in the graft are important for clinical outcomes following transplantation. These numbers are particularly relevant in umbilical cord blood (UCB) transplantation, where low numbers of stem cells are directly related to delayed hematopoietic and immune reconstitution. Improved HSC expansion strategies may significantly impact transplantation outcome, enabling broader applications beyond UCB transplantation. Furthermore, these strategies are also needed to realize the full therapeutic potential of genome editing technologies to correct hematopoietic stem cells derived from patients with hematologic disorders. Since efforts to expand HSCs in cytokine-supported liquid cultures have been largely unsuccessful, efficient expansion will require an appropriate context that is provided by the hematopoietic stem cell niche. Future studies must also evaluate how niche signals regulate stem cell function to optimize cell expansion, and proper humanized mouse models must be developed to help predict stem cell function and regulation by the niche.

Name of idea submitter and other team members who worked on this idea Alice Kuaban on behalf of the American Society of Hematology (ASH)

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28 net votes
46 up votes
18 down votes
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Goal 3: Advance Translational Research

Stem Cell Biology

There is a need to develop “designer platelets” and “designer red cells,” as well as facilitate large-scale production of these products for therapeutic and diagnostic use.

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Critical Challenge (CC)

Details on the impact of addressing this CQ or CC

The reprogramming of adult stem cells has resulted in the generation of induced pluripotent stem cells (iPSCs) that can develop into any tissue of the body. These iPSCs ultimately may be used as a transplantable source of stem cells for a variety of hematologic diseases. Although this technology has enabled the generation of patient-specific or disease-specific stem cells that are also amenable to genetic manipulation, the major scientific hurdle has been the ability to create clinically meaningful functional blood products, including transplantable HSCs from differentiating iPSCs. The production of clinically functional blood products -- i.e. red blood cells derived from autologous iPSCs --could replace allogeneic products in highly immunized patients and the generation of megakaryocytes for patient-specific platelet production from iPSCs could drive significant progress in this area. Furthermore, disease-specific iPSCs could serve as targets for both drug development and drug screening in patients with rare hematologic disorders. In addition, support for scale-up and GMP processes, which are difficult to fund via the R01 mechanism will require specific grant opportunities tailored to infrastructure and process development.

Name of idea submitter and other team members who worked on this idea Alice Kuaban on behalf of the American Society of Hematology (ASH)

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25 net votes
53 up votes
28 down votes
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Goal 1: Promote Human Health

Human normal variation and resilience across lifespan

What is the measureable normal human variation at the -omic, cellular, organ, and system levels within the population and across the lifespan?
• What are the range of normal human cellular functions that create resilience at all levels—cells, organs, organ systems?
• What inter-organ, tissue, and cellular communications maintain individual health and the health of populations?
• How do we understand why individuals with... more »

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Compelling Question (CQ)

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• Will provide a better definition of what is normal in order to better interpret and exploit the big data available through increased personalized monitoring and use of EMRs.
• Insights into the underlying mechanisms of resilient phenotypes will provide new paradigms for disease prevention and treatment.

Feasibility and challenges of addressing this CQ or CC

Feasibility will depend on the level of investment (large) and accessibility to commons data.

Name of idea submitter and other team members who worked on this idea NHLBI Staff

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19 net votes
26 up votes
7 down votes
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Goal 2: Reduce Human Disease

Stem Cell Immunology

We now can create critical cell types like cardiomyocytes etc. from stem cells. Additionally, we are learning the rules of using these cells to rebuild tissues. A major gap in our knowledge relates to the immunobiology of these cells. Lessons from transplantation medicine are only partially applicable, because solid organs are more complex and likely more immunogenic than defined cell populations.

How does the immune... more »

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Compelling Question (CQ)

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We now can generate large quantities of critical cell types whose deficiencies underlie many chronic diseases like heart failure. This breakthrough brings us to the next-level impediment: the immune system. While induced pluripotent stem cells have the potential to obviate rejection, in practical terms this is cost-prohibitive: It will cost huge amounts of money to produce and qualify a single patient's cell dose. Moreover, human cardiomyocytes are potent when given to infarcted hearts in the acute or sub-acute phase of infarction, but they have no benefit with chronic heart failure. The 6 months required to produce iPSC-cardiomyocytes precludes their autologous use for myocardial infarction.

We need an off the shelf cell therapy product for myocardial infarction that can be mass produced and qualified for large numbers of patients. This means an allogeneic product is necessary. Identifying the immune response to cardiomyocytes or other cell products will teach us how to precisely immunosuppress the patient, thereby minimizing complications, or alternatively, how to engineer the cells so as to avoid immunogenicity in the first place.

Lessons from the study of cardiomyocyte transplantation could extend to dopamine neurons, pancreatic beta-cells, retinal cells, myelinating cells and many other areas that cause common chronic disease.

Feasibility and challenges of addressing this CQ or CC

We know a great deal of transplant immunology from hematopoietic stem cell transplantation (graft versus host) and from solid organ transplantation (host versus graft). There are good mouse and large animal (including non-human primate) models of stem cell differentiation and organ transplantation. This offers low hanging fruit where, in perhaps 5 years, we could discern the critical similarities and differences between transplanting stem cell derivatives and organ or marrow transplantation. These studies will inform clinical trials of allogeneic human stem cell derivatives that will be underway by then.

Success in this area will require bringing together researchers interested in stem cell biology and transplant immunology. A properly resourced RFA from NIH could be just the thing needed to promote this interaction.

Name of idea submitter and other team members who worked on this idea Charles Murry, MD, PhD

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23 net votes
45 up votes
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Goal 3: Advance Translational Research

Regenerative Medicine 2.0 in Heart and Lung Research - Back to the Drawing Board

Stem cell therapies have been quite successful in hematologic disease but the outcomes of clinical studies using stem cells for cardiopulmonary disease have been rather modest.

Explanations for this discrepancy such as the fact that our blood has a high rate of physiologic, endogenous turnover and regeneration whereas these processes occur at far lower rates in the heart and lung. Furthermore, hematopoietic stem cells... more »

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Critical Challenge (CC)

Details on the impact of addressing this CQ or CC

Some barriers to successfully implementing cardiopulmonary regeneration include the complex heterogeneous nature of the heart and lung.

Hematopoietic stem cells can give rise to all hematopoietic cells but the heart and lung appear to contain numerous pools of distinct regenerative stem and progenitor cells, many of which only regenerate a limited cell type in the respective organ. The approach of injecting one stem cell type that worked so well for hematopoietic stem cells is unlikely to work in the heart and lung.

We therefore need new approaches which combine multiple regenerative cell types and pathways in order to successfully repair and regenerate heart and lung tissues. These cell types will likely also require specific matrix cues since there are numerous, heterogeneous microenvironments in the heart and lung.

If we rethink our current approaches to regenerating the heart and lung and we use combined approaches in which multiple cell types and microevironments are concomitantly regenerated (ideally by large scale collaborations between laboratories), we are much more likely to achieve success.

This will represent a departure from the often practiced "Hey, let us inject our favorite cell" approach that worked so well in hematologic disease but these novel, combined approaches targeting multiple endogenous and/or exogenous regenerative cells could fundamentally change our ability to treat heart and lung disease.

Name of idea submitter and other team members who worked on this idea Jalees Rehman

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7 net votes
11 up votes
4 down votes
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Goal 2: Reduce Human Disease

Human Lung Progenitor Cells, Lung Epithelial Differentiated iPSCs, and Therapeutics

What are the biological properties and key surface markers of human lung progenitor cells and lung epithelial differentiated iPSCs? How can these cell populations be targeted for therapeutic purposes, including regenerative therapy?

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Compelling Question (CQ)

Name of idea submitter and other team members who worked on this idea Cystic Fibrosis Foundation

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6 up votes
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Goal 2: Reduce Human Disease

Making It Real: Affordable Physiologically Relevant In Vitro Environments

We have done the best we can to mimic the human internal environment in vitro for the discovery, testing, and validation of therapeutics, but there is a critical need to do better. The use of more complex cell-based in vitro models is the result of the recognition of how little predictive power there is in current experimental conditions, even with animal models. With an in vitro environment that goes beyond temperature... more »

Is this idea a Compelling Question (CQ) or Critical Challenge (CC)? Critical Challenge (CC)

Details on the impact of addressing this CQ or CC

Physiologically relevant in vitro environments could potentially impact research on every tissue type, disease, and intervention, including transfusion-based treatments. Basic research, drug-testing, and translational medicine would all be fundamentally altered. Individualized medicine, cellular therapies, and regenerative medicine could all benefit from in vitro conditions that best support the care of the patient's cells and guide those cells in the direction needed for effective treatment.

Feasibility and challenges of addressing this CQ or CC

Research and Industry are in the early stages of developing the techniques and know-how needed to address the technical challenges in establishing human-relevant in vitro environments. We already have the technology to control in vitro oxygen and other critical gas components. Mimicking cell-cell interactions and variable cell states such as states of differentiation or stress are areas under active research. Computational and analytical techniques are being developed that can gain insight from large data sets. More of a challenge may be assessing distant effects like metabolism of drugs by the liver or potential drug and cellular interactions with the external environment. However, making a human-predictive in vitro environment affordable is the challenge that could define success or failure of any particular approach. It is feasible within the next ten years to have truly predictive in vitro environments for drug cellular therapy development.

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