Cell Factors

A Comprehensive Research Guide to Placental-Derived Regenerative Secretomes

Cellular aging research has converged on a central and increasingly well-documented insight: one of the core drivers of aging, chronic disease, and declining regenerative capacity is not simply the death of cells, but the breakdown of communication between them. As cells age, they lose the ability to respond appropriately to repair signals, growth cues, and metabolic regulators. The signaling environment that once maintained tissue homeostasis becomes dysregulated, fragmented, and progressively less effective.

Cell Factors™ is a research-grade, cell-free regenerative secretome developed to address this problem at its biological root. Rather than delivering live stem cells, Cell Factors™ delivers the secretome – the full spectrum of signaling molecules that young, highly regenerative placental cells produce to communicate with surrounding tissues. In essence, it is the communication system of young cells, without the cells themselves.

Derived from multiple early placental cell sources, Cell Factors™ is a concentrated, lyophilized blend of growth factors, cytokines, chemokines, signaling peptides, and extracellular signaling proteins. Importantly, the formulation is entirely acellular — it contains no living cells and no DNA — making it a stable, standardizable, and highly versatile tool for in vitro and preclinical research.

Cell Factors™ is available in two formulations:

• Cell Factors™ (13mg active protein) – the standard research-grade secretome product

(13mg active protein)

• Cell Factors™ Max (26mg active protein) – an enhanced formulation for advanced

research protocols

This article provides a comprehensive overview of the biology, mechanisms, research applications, handling protocols, and regulatory status of Cell Factors™, structured for researchers, longevity scientists, and qualified laboratory professionals seeking to understand and work with this emerging research compound.

How It Works: Mechanisms of Action

The biological rationale behind Cell Factors™ rests on the concept of the secretome — the complete set of molecules that cells release to communicate with their environment. In regenerative biology, this includes growth factors, extracellular vesicles, cytokines, chemokines, and signaling peptides. Together, these molecules regulate tissue repair, immune balance, mitochondrial function, gene expression, and receptor sensitivity. Early placental cells operate in one of the most regenerative biological environments that exists: rapid tissue growth, active immune tolerance, and intense repair signaling all occur simultaneously. As a result, these cells produce an exceptionally broad and potent regenerative signaling profile compared with adult cells. Cell Factors™ is designed to capture and deliver this entire signaling environment in a stable, acellular format. The product claims activation of over 300 cellular signaling pathways, which represents a substantially broader signaling profile than competing regenerative research models such as PRP or standard exosome preparations.

Restoration of Cell-to-Cell Communication

Cells constantly send and receive signals through receptor-ligand interactions. Over time, this communication degrades due to receptor desensitization, signaling pathway dysfunction, and the accumulation of cellular stress. Cell Factors™ contains ligands capable of activating cellular receptors involved in repair, growth, and metabolic regulation, potentially restoring intercellular communication pathways that have become impaired through aging or disease.

Receptor Sensitivity Recalibration

A significant research hypothesis underlying Cell Factors™ is that placenta-derived signaling molecules may be capable of restoring receptor responsiveness in cells that have developed tolerance or desensitization. This mechanism is particularly relevant in the context of hormone signaling, mitochondrial regulation, and inflammatory pathway modulation — areas where receptor downregulation is a well-documented consequence of chronic stimulation or stress.

Mitochondrial Signaling

Several molecular components present in placental secretomes have been shown in research models to influence mitochondrial function directly. These include molecules that modulate:

• Mitochondrial biogenesis — the creation of new mitochondria
• Reactive oxygen species (ROS) signaling — a key driver of cellular aging and oxidative

stress

• Mitochondrial-nuclear communication — the signaling axis that coordinates cellular

energy production with nuclear gene expression Because mitochondrial dysfunction is central to the biology of aging, this mechanism represents

one of the most scientifically compelling aspects of the Cell Factors research model.

Inflammatory Pathway Regulation

Chronic low-grade inflammation — sometimes referred to as “inflammaging” — is one of the most significant barriers to tissue repair and regeneration. Placental tissue is uniquely equipped to manage inflammation, given the biological necessity of maintaining immune tolerance during fetal development. Accordingly, placental secretomes contain powerful anti-inflammatory cytokines capable of influencing:

• NF-κB signaling — a master regulator of the inflammatory response
• Cytokine cascades involved in chronic inflammation
• Immune cell activation and polarization

By modulating these pathways, Cell Factors™ may support preclinical research into inflammatory disease models, tissue repair, and chronic pathology.

Epigenetic Reprogramming Signals

Among the most forward-looking aspects of the Cell Factors™ research model is its potential to study epigenetic reprogramming. Certain growth factors present in placental secretomes have been shown to influence chromatin remodeling and gene transcription patterns, including:

• Histone acetylation — a modification that generally promotes gene expression
• DNA methylation — a heritable epigenetic mark linked to cellular aging and the

epigenetic clock

• Gene transcription pathway activation — shifts in the overall pattern of which genes are

expressed

In experimental models, these signals can shift cells toward a more youthful gene expression pattern. This makes Cell Factors™ a potentially valuable tool in aging biology research focused on epigenetic rejuvenation strategies.

Key Signaling Pathways Activated

Cell Factors™ is reported to engage the following core signaling networks, among others:

• TGF-β signaling — central to tissue repair, fibrosis regulation, and immune modulation
• MAPK signaling — involved in cell proliferation, differentiation, and stress responses
• PI3K-AKT signaling — a key survival and metabolic pathway
• mTOR regulation — the central hub of cellular growth and autophagy
• Wnt signaling — a critical pathway for tissue stem cell maintenance and regeneration
• Mitochondrial signaling networks — coordinating energy metabolism and cellular

survival

Research Benefits: Potential Applications by Area

Aging Biology and Epigenetic Research

Cell Factors™ is positioned as a primary research tool for studying how the cellular signaling environment changes with age and how it might be modulated to shift cells toward more youthful functional states. The breadth of its signaling profile — spanning growth factors, cytokines, and epigenetic-influencing proteins — makes it particularly suited to aging biology research programs studying the hallmarks of aging, including cellular senescence, loss of proteostasis, and epigenetic drift. Researchers studying epigenetic clocks, DNA methylation patterns, and age-related gene expression changes may find Cell Factors™ useful as a means of investigating whether placental signaling environments can shift these markers in experimental cell models.

Tissue Repair and Regenerative Signaling

Placental-derived secretomes contain a rich array of growth factors and signaling peptides directly implicated in tissue repair, including TGF-β family members, FGF variants, and VEGF-related molecules. In vitro studies examining how these signals influence wound healing, angiogenesis, and tissue remodeling may benefit from the broad signaling profile delivered by Cell Factors™. Research applications in this domain include musculoskeletal tissue repair, vascular biology, connective tissue modeling, and dermal regeneration studies.

Mitochondrial Health and Cellular Energy Research

Given its influence on mitochondrial biogenesis, ROS regulation, and mitochondrial-nuclear communication, Cell Factors™ is well-suited to research programs focused on the energetic basis of aging and disease. Experimental models examining how mitochondrial signaling affects cellular aging, metabolism, and stress resilience may find this product a valuable addition to their research toolkit.

Inflammatory Signaling and Immune Modulation

The anti-inflammatory cytokine profile of placental-derived secretomes makes Cell Factors™ a relevant research tool for studying how inflammatory pathways can be modulated at the receptor level. Preclinical research examining NF-κB signaling, cytokine cascades, neuroinflammation, renal stress, and vascular inflammation may benefit from the inclusion of Cell Factors™ as a signaling reference compound.

Receptor Pharmacology and Sensitivity Studies

Cell Factors™ may be particularly valuable in receptor pharmacology research focused on

desensitization, tolerance, and receptor upregulation. Because its signaling molecules can modulate receptor responsiveness, it offers a means of studying how cells that have become unresponsive to key signaling cues might have their sensitivity restored — a question with significant implications for drug development and chronic disease research.

Integration with Peptide Research Protocols

Cell Factors™ is designed to be compatible with existing peptide research programs. Specific integrated protocols combining Cell Factors™ with Klotho protein research, creating multi- compound research frameworks for investigating longevity pathways. Its lyophilized format makes it easy to incorporate into existing laboratory workflows.

What the Science Shows

Cell Factors™ draws from a rich and rapidly growing body of scientific literature on placental biology, secretome composition, and regenerative signaling. While the specific product formulation itself has not yet been the subject of large-scale published clinical trials, the underlying science supporting placental-derived secretomes is substantial. The following summarizes key research areas and findings relevant to Cell Factors™.

Placental Secretome Composition and Regenerative Capacity

Multiple peer-reviewed studies have characterized the signaling output of placental tissues including Wharton’s Jelly, amniotic fluid, amniotic membrane, and chorion. Research has consistently shown that these tissues produce significantly higher concentrations of regenerative growth factors, anti-inflammatory cytokines, and tissue remodeling signals than adult-derived tissue sources. This has led to substantial scientific interest in placental-derived materials as components for regenerative medicine and tissue engineering applications. Studies examining Wharton’s Jelly mesenchymal stromal cells (WJ-MSCs) have demonstrated broad immunomodulatory effects, anti-fibrotic signaling, and the capacity to support tissue repair in experimental models. The secretome of WJ-MSCs — rather than the cells themselves — has increasingly been identified as the primary driver of these effects, supporting the rationale for acellular secretome products.

Mitochondrial Signaling and Aging Research

Research into the relationship between mitochondrial dysfunction and cellular aging has demonstrated that the disruption of mitochondrial-nuclear communication is a key feature of the aging process. Studies examining mitochondrial biogenesis signaling pathways — particularly through PGC-1α and related factors — have found that restoration of these pathways can partially reverse features of cellular aging in experimental models.

Placental-derived secretomes have been shown in several research contexts to contain factors influencing ROS production and mitochondrial membrane potential. Studies in this area suggest that signaling molecules present in placental secretomes may help maintain mitochondrial integrity under conditions of oxidative stress.

Epigenetic Research and the Aging Clock

The discovery of epigenetic clocks, biological measures of cellular age based on DNA methylation patterns, has transformed aging biology research. Studies using Yamanaka factor-based reprogramming approaches have demonstrated that epigenetic aging can be partially reversed in experimental models, opening significant questions about what other biological interventions might influence epigenetic age. Placental signaling environments are characterized by highly active chromatin remodeling and gene expression programs. Research suggests that exposure to placental-derived signaling molecules may shift methylation patterns and gene expression profiles in aged cell models toward more youthful states, though this remains an area of active investigation.

Inflammatory Biology and Cytokine Research

A substantial body of research has established chronic low-grade inflammation as a central driver of aging and age-related disease, a phenomenon often described as “inflammaging.” Placental immune tolerance mechanisms, including the secretion of anti-inflammatory interleukins (particularly IL-10, IL-13, and related cytokines), TGF-β, and other immunomodulatory molecules, have been studied extensively in transplantation and autoimmune research. Studies using conditioned media from placental cell cultures have shown suppression of NF-κB- mediated inflammatory signaling and reduction of pro-inflammatory cytokine release in experimental models. These findings support the hypothesis that placental secretome products may offer a means of studying inflammatory regulation in a research context.

Cell-Free Approaches in Regenerative Medicine Research

A growing body of literature has challenged the traditional assumption that stem cell therapy works through the direct engraftment and differentiation of transplanted cells. Increasingly, research has identified the secretome of stem cells, including extracellular vesicles, exosomes, and soluble signaling factors, as the primary mediator of therapeutic effects observed in animal models. This “paracrine hypothesis” has driven significant interest in developing cell-free alternatives to stem cell therapy, with the goal of capturing the signaling benefits of young regenerative cells without the logistical, regulatory, and immunological challenges of live cell administration. Cell Factors™ is positioned within this scientific framework.

Dosing Protocol

The following dosing information applies strictly to in vitro research use. All protocols should be developed and executed by qualified research personnel under appropriate institutional oversight.

Standard Research Protocol

Cell Factors™ is supplied in lyophilized (freeze-dried) powder form and must be reconstituted with sterile water only. Standard in vitro research protocols typically involve the preparation of a stock solution at a defined concentration, followed by dilution to working concentrations appropriate to the specific experimental design.

• Full vial per dose
• 0.5ml sterile water
• SubQ prefer for convivence
• AM (Morning) aligns with cortisol cycle and cellular repairs windows
• Monthly dose (quarterly for Cell Factors Max)

As Cell Factors™ is a complex signaling mixture rather than a single defined molecule, optimal working concentrations should be determined empirically for each experimental application. Researchers are advised to consult technical documentation and applicable scientific literature for guidance on concentration ranges relevant to specific research endpoints.

Research Formats Available

Cell Factors™ is available in three research configurations:

• Single-Cycle Format: Designed for discrete experimental protocols examining the acute

signaling effects of the secretome in a defined cell culture or research system

• Multi-Cycle Environmental Recalibration Programs: Longer-duration research designs

examining how repeated or sustained secretome exposure influences cell signaling over time

• Integrated Protocol with Klotho Protein: A multi-compound research framework

combining Cell Factors™ with Klotho protein to study synergistic or additive effects on longevity-related signaling pathways

The selection of research format should be guided by the specific scientific question being investigated, available cell culture infrastructure, and experimental duration parameters.

Reconstitution Protocol

Reconstitution of lyophilized Cell Factors™ should follow standard research peptide protocols using a sterile, aqueous reconstitution vehicle appropriate to the intended experimental application. Recommended practice includes:

• Do not use bacteriostatic water. Only use sterile water as the reconstitution vehicle
• Allow the lyophilized material to equilibrate to room temperature before opening

• Add reconstitution fluid slowly and gently to the vial wall — do not inject directly onto

the lyophilized cake

• Swirl gently to dissolve — do not vortex or shake vigorously
• Allow complete dissolution before proceeding to experimental use
• Prepare aliquots of the reconstituted stock solution for storage if not used immediately

Side Effects and Safety Considerations

Because Cell Factors™ is an acellular product intended exclusively for in vitro research use, its side effect profile is considered in the context of laboratory handling and experimental cell biology rather than clinical pharmacology. The following reflects current understanding of safety considerations relevant to research use.

Cell Culture Considerations

As a complex biological signaling mixture, Cell Factors™ may exert concentration-dependent effects on cell culture systems that should be characterized empirically. Researchers should be aware of the potential for:

• Non-specific activation of multiple signaling pathways at higher concentrations
• Variable effects across different cell lines and primary cell types depending on receptor

expression profiles

• Potential interference with specific downstream assay systems sensitive to cytokine or

growth factor presence

Biological Complexity and Standardization

As with all secretome-based products, the biological complexity of Cell Factors™ presents inherent challenges for experimental reproducibility. Researchers should be aware that:

• Secretome composition can vary between manufacturing batches, potentially affecting

experimental consistency

• Not all signaling molecules present in the formulation have been individually

characterized or mapped

• Comparison of results across research groups requires careful attention to lot number,

concentration, and experimental protocol consistency

Handling Precautions

Standard laboratory biosafety precautions apply when working with Cell Factors™. Despite its acellular nature, appropriate personal protective equipment (PPE) should be used during reconstitution and handling. Researchers should follow institutional biosafety protocols for handling biological research materials.

Contraindications and Precautions

As a research use only (RUO) product, Cell Factors™ is subject to the following restrictions and precautions:

• The product is intended exclusively for in vitro or preclinical research conducted by

qualified laboratory professionals

• Cell Factors™ should not be administered to animals outside of an approved research

protocol with appropriate institutional oversight (IACUC approval or equivalent)

• Researchers with known sensitivities to placental-derived biological materials should

implement appropriate safety protocols

• Cell Factors™ should not be used in any experimental context for which it has not been

validated, without appropriate pilot characterization studies

Researchers are advised to review all applicable institutional, local, and national regulations governing the use of biological research materials prior to initiating any research program involving Cell Factors™.

Comparison: Cell Factors vs. Other Regenerative Research

Models

Understanding how Cell Factors™ compares with other available regenerative research tools is essential for selecting the appropriate model for a given experimental question. The following overview addresses the key distinctions between Cell Factors™ and commonly used alternatives.

Research Model Signaling Cell Content Stability Regulatory Key Limitations Breadth Complexity PRP (Platelet- Limited (~50- Acellular Moderate Low Narrow signaling Rich Plasma) 100 pathways) (platelets) profile; sourcing variability Wharton’s Jelly / High Live cells Low High Immune rejection Stem Cells present risk; regulatory restrictions; inconsistent potency Exosomes (EVs) Moderate Acellular Moderate Moderate Fewer signaling (<100 networks; batch pathways) consistency challenges

Cell Factors™ Very High Acellular (no High Moderate Complex signaling (300+ live cells, no (lyophilized) mixture; batch-to- pathways) DNA) batch variability requires monitoring

Versus PRP

Platelet-Rich Plasma (PRP) has been widely studied as a regenerative research tool. Its signaling profile is limited primarily to platelet-derived growth factors and a narrow range of inflammatory mediators. Cell Factors™ is estimated to activate approximately four to five times more signaling pathways than PRP, offering a substantially richer research environment for studying regenerative signaling.

Versus Stem Cell Models

Live stem cell models — including Wharton’s Jelly MSCs, amniotic stem cells, and umbilical cord blood stem cells — offer high regenerative potential but come with significant practical and regulatory challenges. These include the need for specialized cell culture infrastructure, risks of immune rejection in co-culture systems, unpredictable cell behavior, and complex regulatory requirements. Cell Factors™ captures the signaling output of these cell types without the cells themselves, offering a more stable and standardizable research tool.

Versus Exosome-Based Products

Exosome preparations have gained significant research interest as cell-free alternatives to stem cell therapy. However, exosome products typically deliver a narrower signaling profile than full secretome preparations, as they represent only one component of the complete secretome output. Cell Factors™ is designed to deliver the full secretome profile — including soluble signaling factors, cytokines, and growth factors beyond the exosome fraction — potentially providing a more comprehensive research signal.

Research Success Tips

Researchers seeking to maximize the quality and reproducibility of Cell Factors™ experimental data are advised to consider the following best practices:

Characterize Baseline Receptor Expression

Before initiating Cell Factors™ experiments, researchers should characterize the receptor expression profile of their experimental cell system. Because Cell Factors™ activates a broad

signaling profile, understanding which receptors are expressed in the target cell type will help predict and interpret experimental outcomes.

Conduct Pilot Concentration-Response Studies

Given the complexity of the Cell Factors™ signaling mixture, pilot studies examining concentration-response relationships across a range of dilutions are strongly recommended before committing to large-scale experimental designs. Optimal working concentrations may vary significantly between cell types and experimental endpoints.

Maintain Lot Consistency

To maximize experimental reproducibility, researchers should use material from a single lot whenever possible for a given experimental series. Lot numbers should be recorded in all experimental records, and researchers comparing results across different lots should account for potential batch-to-batch variation in secretome composition.

Consider Temporal Dynamics

Secretome signaling effects are inherently dynamic — different signaling pathways may be activated at different time points following exposure. Researchers should design time-course experiments to capture the temporal dynamics of Cell Factors™ signaling, particularly when studying pathways with known differences in activation kinetics.

Pair with Appropriate Controls

All Cell Factors™ experiments should include appropriate vehicle controls (reconstitution vehicle at equivalent volume/concentration), negative controls, and, where available, positive controls using well-characterized signaling molecules relevant to the pathway of interest. This is essential for distinguishing specific secretome-mediated effects from non-specific responses.

Document Full Protocol Details

Comprehensive documentation of all experimental conditions — including lot number, reconstitution vehicle, working concentration, incubation duration, cell passage number, and culture conditions — is essential for meaningful interpretation and replication of results.

Storage and Handling

Lyophilized (Pre-Reconstitution) Storage

Cell Factors™ is supplied as a lyophilized powder with the following recommended storage conditions:

• Long-term storage: -20°C (standard laboratory freezer temperature)
• Protect from light during storage
• Keep vials sealed and dry until ready for use
• Avoid repeated freeze-thaw cycles of the lyophilized material
• Shelf stability under recommended storage conditions should be confirmed with current

product documentation from BioLongevity Labs

Reconstituted Solution Storage

Following reconstitution, Cell Factors™ working solutions have a significantly reduced stability window compared with the lyophilized form:

• Reconstituted solutions should be used promptly or aliquoted and stored at -80°C for

extended research use

• Avoid repeated freeze-thaw cycles of reconstituted material — prepare single-use

aliquots where possible

• Reconstituted solutions should not be stored at room temperature for extended periods
• Refrigerated (4°C) short-term storage of reconstituted material is acceptable for up to 24-

72 hours, depending on reconstitution vehicle; consult current product guidance

Handling Precautions

• Allow vials to equilibrate to room temperature before opening to minimize condensation

and moisture contamination

• Use sterile technique throughout reconstitution and handling
• Inspect vials for integrity before use; do not use vials with compromised seals or visible

contamination

• Dispose of used vials and biological materials in accordance with institutional biosafety

protocols

Legal Status

United States Regulatory Status

Cell Factors is classified and sold as a Research Use Only (RUO) product in the United States. It is not approved by the U.S. Food and Drug Administration (FDA) for clinical or therapeutic use in humans or animals. The product is intended exclusively for use in controlled laboratory settings by qualified research professionals. The statements made regarding Cell Factors™ have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. This product is for laboratory use only.

Frequently Asked Questions

What exactly is Cell Factors™?

Cell Factors™ is a placental-derived regenerative secretome — a concentrated blend of signaling molecules, growth factors, cytokines, chemokines, and signaling peptides produced by early placental cell types. It is designed for in vitro and preclinical research use as a tool for studying regenerative signaling, aging biology, inflammatory regulation, and mitochondrial function.

Does Cell Factors™ contain live cells or DNA? No. Cell Factors™ is entirely acellular — it contains no living cells and no DNA. This distinguishes it from stem cell-based therapies and significantly reduces concerns related to immune rejection, disease transmission, and regulatory complexity associated with live cell products.

What makes placental-derived secretomes particularly useful for research? Early placental tissues exist in a uniquely regenerative biological environment characterized by rapid growth, immune tolerance, and intense repair signaling. As a result, they produce significantly higher concentrations and a broader spectrum of regenerative signaling molecules compared with adult tissue-derived sources. This makes placental secretomes an exceptionally rich and biologically relevant model for regenerative biology research.

How does Cell Factors™ compare to exosome products? Exosome preparations typically deliver a narrower signaling profile than full secretome products, as they represent only the extracellular vesicle fraction of the secretome. Cell Factors™ delivers the complete secretome output — including soluble growth factors, cytokines, and other signaling proteins beyond the exosome fraction — potentially providing researchers with a more comprehensive signaling environment for experimental studies.

How many signaling pathways does Cell Factors™ activate? Cell Factors™ is reported to activate over 300 distinct cellular signaling pathways, including core regenerative networks such as TGF-β, MAPK, PI3K-AKT, mTOR, Wnt, and mitochondrial signaling. This represents a substantially broader signaling profile than PRP (approximately 50- 100 pathways) or standard exosome preparations (fewer than 100 pathways).

What cell types and research systems is Cell Factors™ appropriate for? Cell Factors™ is a versatile research tool appropriate for a wide range of in vitro experimental systems, including primary cell cultures, established cell lines, and organoid models relevant to aging biology, regenerative medicine, inflammatory signaling, mitochondrial research, and receptor pharmacology. Researchers should conduct pilot characterization studies to determine optimal working concentrations for their specific cell system.

Can Cell Factors™ be used in combination with other research peptides? Yes. Cell Factors™ is designed to be compatible with existing peptide research programs. Integrated research protocol combining Cell Factors™ with Klotho protein for studies investigating longevity-related signaling pathways. Researchers interested in multi-compound protocols should consult current product documentation for guidance.

What are the key scientific limitations of Cell Factors™ research? As with all complex biological research products, Cell Factors™ presents several scientific challenges that researchers should be aware of. These include the inherent variability of secretome composition between manufacturing batches, the incomplete mapping of all signaling molecules present in the formulation, and the difficulty of attributing specific experimental effects to individual components within a complex mixture. Reproducibility is best ensured through consistent lot usage, rigorous documentation, and appropriate experimental controls.

References

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• Salminen A, Kaarniranta K, Kauppinen A. Inflammaging: disturbed interplay between

autophagy and inflammasomes. Aging. 2012;4(3):166-175.

• Horvath S. DNA methylation age of human tissues and cell types. Genome Biology.

2013;14(10):R115.

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and Potential Role in Regenerative Medicine. Cell Transplantation. 2020;29:963689720929757.

• Sung DK, et al. Comparative Study of Mesenchymal Stem Cells from Wharton’s Jelly

and Amniotic Membrane. Stem Cells International. 2016.

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Reduces the Inflammatory State in Vitro. Stem Cells and Development. 2020;29(14).

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Atria Books, 2019. (Background reading on aging biology and epigenetics.)

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status and perspectives. Cell Transplantation. 2014;23(9):1045-1059.