GO:0071866 negative regulation of apoptotic process in bone marrow cell: Apoptosis Regulation Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071866 describes any process that stops, prevents, or reduces the frequency or rate of apoptosis specifically in bone marrow cells.
• Bone marrow cell survival is controlled by a balance of pro- and anti-apoptotic signals, including autophagy, cytokines, and stromal interactions.
• Latexin is a key regulator of hematopoietic stem cell quiescence and survival in the bone marrow, influencing apoptotic thresholds.
• IFN-γ signaling promotes hematopoietic cell destruction and bone marrow failure, highlighting the importance of negative regulation of apoptosis.
• Bone marrow mesenchymal stem cell-derived exosomes can modulate apoptosis in neighboring cells, representing a therapeutic avenue.
• CRISPR-based models (knockout, knock-in, overexpression) are essential to dissect the causal role of specific genes in this process.
Description
The bone marrow is a highly dynamic tissue where hematopoietic stem and progenitor cells (HSPCs) continuously self-renew and differentiate. Apoptosis, or programmed cell death, is a critical homeostatic mechanism that eliminates damaged or excess cells. However, excessive apoptosis in the bone marrow leads to cytopenias and bone marrow failure, while insufficient apoptosis can contribute to leukemogenesis. The Gene Ontology term GO:0071866, negative regulation of apoptotic process in bone marrow cell, captures the biological processes that protect bone marrow cells from inappropriate cell death. Understanding this term is essential for researchers studying hematopoiesis, immune-mediated marrow failure, and leukemia. Key regulators include Latexin, a carboxypeptidase inhibitor that supports hematopoietic stem cell survival, and autophagy, which controls neutrophil production by limiting apoptosis. Cytokines such as IFN-γ can override these protective mechanisms, leading to marrow aplasia. Thus, GO:0071866 represents a convergence point for cell-intrinsic and microenvironmental signals that determine bone marrow cell fate.
negative regulation of apoptotic process in bone marrow cell At A Glance
| GO ID | GO:0071866 |
|---|---|
| GO term | negative regulation of apoptotic process in bone marrow cell |
| Ontology | biological_process |
| Synonym | negative regulation of apoptosis in bone marrow; inhibition of apoptosis in bone marrow; negative regulation of bone marrow cell apoptosis; downregulation of apoptosis in bone marrow |
| Major function | Prevents or reduces apoptosis of bone marrow cells, supporting hematopoietic cell survival and homeostasis |
| Related processes | Hematopoiesis, immune response, bone marrow failure, leukemogenesis |
| Key regulators | Latexin, autophagy machinery, IFN-γ signaling, mesenchymal stem cell-derived factors |
| Disease relevance | Aplastic anemia, myelodysplastic syndromes, leukemia, osteoarthritis-related bone changes |
What Is GO:0071866?
GO:0071866 is defined as any process that stops, prevents, or reduces the frequency, rate or extent of the occurrence or rate of cell death by apoptotic process in the bone marrow. In simpler terms, it encompasses all molecular and cellular events that keep bone marrow cells alive by blocking apoptosis. This includes anti-apoptotic signaling, survival factor support, and inhibition of pro-apoptotic pathways specifically within the bone marrow niche.
Why Is negative regulation of apoptotic process in bone marrow cell Important in Cell Biology?
GO:0071866 is crucial because the bone marrow is the primary site of blood cell production, and dysregulated apoptosis underlies numerous hematological disorders. Negative regulation of apoptosis ensures that hematopoietic stem and progenitor cells survive to replenish the blood system. When this process fails, conditions such as aplastic anemia and myelodysplastic syndromes can arise. Conversely, pathologically enhanced survival of bone marrow cells can contribute to leukemia. Therefore, understanding the mechanisms that negatively regulate apoptosis in bone marrow cells is essential for developing targeted therapies for bone marrow failure and hematological malignancies.
• Maintains hematopoietic stem cell pool by preventing premature apoptosis.
• Supports efficient neutrophil production by controlling autophagy-mediated survival.
• Protects bone marrow cells from immune-mediated destruction, as seen in IFN-γ-driven marrow failure.
• Influences bone remodeling through osteoclast differentiation and survival.
• Modulates inflammatory responses after bone marrow cell transplantation.
• Contributes to the pathogenesis of osteoarthritis via exosome-mediated effects on chondrocytes.
• Provides a target for therapeutic intervention in aplastic anemia and myelodysplastic syndromes.
• Helps understand the role of mechanical forces (e.g., negative pressure) on bone marrow mesenchymal stem cell survival.
• Relevant to thymic negative selection and immune tolerance through shared apoptotic regulators.
• Offers a framework for CRISPR screening to identify novel survival factors in bone marrow cells.
What Happens During negative regulation of apoptotic process in bone marrow cell?
Survival Signaling by Latexin
In simple terms: Latexin acts like a shield that protects blood stem cells from dying.
Latexin is a carboxypeptidase inhibitor that is highly expressed in hematopoietic stem cells. It regulates quiescence and survival by inhibiting proteases that would otherwise trigger apoptosis. Studies show that Latexin supports the maintenance of the hematopoietic stem cell pool by negatively regulating apoptotic pathways.
Autophagy-Mediated Survival
In simple terms: Autophagy is a cellular recycling process that can keep neutrophils alive by preventing apoptosis.
In the bone marrow, autophagy controls neutrophil production by limiting apoptosis. Disruption of autophagy leads to increased apoptosis of neutrophil precursors, indicating that autophagy is a negative regulator of apoptotic process in bone marrow cells.
Cytokine and Immune Modulation
In simple terms: Inflammatory signals like IFN-γ can override survival mechanisms and cause bone marrow cells to die.
IFN-γ mediates hematopoietic cell destruction in immune-mediated bone marrow failure. Negative regulation of apoptosis in this context involves counteracting IFN-γ signaling to preserve bone marrow cells. This highlights the balance between pro-apoptotic cytokines and survival factors.
Microenvironmental Support
In simple terms: Bone marrow mesenchymal stem cells and their exosomes help neighboring cells survive.
Bone marrow mesenchymal stem cell-derived exosomes can influence apoptosis in target cells. For example, exosomal lncRNA TUC339 regulates macrophage polarization and chondrocyte apoptosis, suggesting that similar mechanisms may operate in the bone marrow niche to negatively regulate apoptosis.
Mechanical and Physical Cues
In simple terms: Physical forces like negative pressure can affect whether bone marrow stem cells live or die.
Negative pressure has been shown to affect human bone marrow mesenchymal stem cells in vitro, influencing their survival and apoptotic rates. This indicates that mechanical cues contribute to the negative regulation of apoptosis in bone marrow cells.
Key Genes Involved in GO:0071866 negative regulation of apoptotic process in bone marrow cell
The following genes and proteins are experimentally implicated in the negative regulation of apoptotic process in bone marrow cells.
| Gene | Major Role | Research Relevance |
|---|---|---|
| LTXN (Latexin) | Inhibits carboxypeptidases; supports hematopoietic stem cell quiescence and survival | Knockout models show reduced stem cell pool; potential target for marrow failure |
| ATG5/ATG7 | Core autophagy machinery; prevents apoptosis of neutrophil precursors | Conditional knockout in hematopoietic cells increases apoptosis |
| IFNGR1/IFNGR2 | Receptors for IFN-γ; mediate pro-apoptotic signaling in bone marrow failure | Blockade or knockout protects against marrow failure |
| BCL2/BCL-XL | Anti-apoptotic proteins; inhibit mitochondrial outer membrane permeabilization | Overexpression enhances bone marrow cell survival |
| MCL1 | Anti-apoptotic BCL-2 family member; critical for hematopoietic stem cell survival | Inducible knockout causes rapid apoptosis of bone marrow cells |
| CASP3/CASP9 | Executioner and initiator caspases; pro-apoptotic | Inhibition or knockout reduces apoptosis in bone marrow cells |
| TNFRSF10B (DR5) | Death receptor; triggers extrinsic apoptosis | Knockdown or knockout protects bone marrow cells from death ligand-induced apoptosis |
| FAS | Death receptor; mediates activation-induced cell death | Mutations in FAS cause autoimmune lymphoproliferative syndrome with bone marrow involvement |
| BCL2L11 (BIM) | Pro-apoptotic BH3-only protein; senses cytokine withdrawal | Knockout prevents apoptosis of hematopoietic cells upon growth factor deprivation |
| PMAIP1 (NOXA) | Pro-apoptotic BH3-only protein; regulated by p53 | Knockout reduces apoptosis in response to DNA damage |
| BECN1 (Beclin-1) | Autophagy regulator; crosstalk with apoptosis | Knockout impairs autophagy and increases apoptosis in bone marrow cells |
| SQSTM1 (p62) | Autophagy receptor; regulates NF-κB survival signaling | Knockout affects bone marrow cell survival under stress |
| CXCL12 | Chemokine; supports hematopoietic stem cell survival in niche | Knockout or inhibition increases apoptosis of HSPCs |
| KITLG (SCF) | Stem cell factor; promotes survival via KIT receptor | Mutations cause bone marrow failure in mice |
| IL-7 | Cytokine; supports lymphocyte survival in bone marrow | Knockout reduces B cell precursors due to apoptosis |
| GATA1 | Transcription factor; regulates erythroid and megakaryocytic survival | Knockdown increases apoptosis of erythroid precursors |
| TP53 | Tumor suppressor; induces apoptosis in response to stress | Knockout reduces apoptosis but increases leukemia risk |
| NFKB1 | Transcription factor; promotes survival gene expression | Knockout increases apoptosis in bone marrow cells under inflammatory stress |
How Is negative regulation of apoptotic process in bone marrow cell Regulated?
The negative regulation of apoptotic process in bone marrow cells is controlled by a complex network of intrinsic and extrinsic signals. Autophagy acts as a survival mechanism by recycling damaged organelles and proteins, thereby preventing apoptosis in neutrophil precursors. Cytokine signaling, such as via IFN-γ, can override these protective mechanisms and promote apoptosis, while survival factors like SCF and CXCL12 sustain cell viability. Transcription factors such as NF-κB and GATA1 regulate the expression of anti-apoptotic genes. Additionally, mechanical cues like negative pressure can modulate survival pathways in mesenchymal stem cells. The interplay between these regulators determines the fate of bone marrow cells under physiological and pathological conditions.
negative regulation of apoptotic process in bone marrow cell and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| IFNGR1 | Aplastic anemia; immune-mediated marrow failure | Knockout mice or CRISPR knockout in HSPCs |
| LTXN | Hematopoietic stem cell depletion; marrow failure | Latexin knockout mice |
| ATG5 | Neutropenia; impaired autophagy | Conditional knockout in hematopoietic cells |
| BCL2 | Lymphoma; apoptosis evasion | Overexpression or knock-in models |
| TUC339 (lncRNA) | Osteoarthritis; chondrocyte apoptosis | Exosome-mediated delivery in vitro |
Immune-Mediated Bone Marrow Failure
In conditions like aplastic anemia, IFN-γ produced by activated T cells induces apoptosis of hematopoietic stem and progenitor cells, leading to marrow aplasia. Negative regulation of apoptosis is impaired, and therapeutic strategies aim to block IFN-γ signaling or enhance survival pathways.
Leukemia and Myelodysplastic Syndromes
Dysregulated apoptosis contributes to the pathogenesis of myelodysplastic syndromes (MDS) and leukemia. In MDS, excessive apoptosis of hematopoietic precursors causes cytopenias, while in leukemia, cells evade apoptosis, leading to clonal expansion. Modulating the negative regulation of apoptosis is a therapeutic goal.
Osteoarthritis and Bone Remodeling
Bone marrow mesenchymal stem cell-derived exosomes can influence chondrocyte apoptosis and macrophage polarization in osteoarthritis. This suggests that negative regulation of apoptosis in bone marrow cells may have implications for joint diseases.
Inflammatory and Septic Conditions
Bone marrow cell transplantation modulates systemic inflammatory responses in septic mice via cell-cell contact, highlighting the role of bone marrow cell survival in inflammation. Negative regulation of apoptosis may influence the efficacy of such therapies.
From negative regulation of apoptotic process in bone marrow cell-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X protect bone marrow cells from apoptosis? | CRISPR knockout in hematopoietic stem/progenitor cells followed by apoptosis assay |
| Does a point mutation in gene Y alter survival signaling? | CRISPR point mutation knock-in in cell lines or primary cells |
| Does overexpression of anti-apoptotic gene Z enhance engraftment? | Lentiviral overexpression in bone marrow cells followed by transplantation |
| Does tagging endogenous protein A affect its anti-apoptotic function? | CRISPR knock-in of fluorescent tag |
| Which genes are essential for bone marrow cell survival? | Genome-wide CRISPR library screening in bone marrow cells |
| Does IFN-γ signaling mediate apoptosis in bone marrow failure? | IFNGR1 knockout mice or CRISPR knockout in human HSPCs |
How to Study the negative regulation of apoptotic process in bone marrow cell Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Flow cytometry with Annexin V/PI | Apoptotic and necrotic cell fractions | Quantify apoptosis in bone marrow cells after gene knockout |
| Caspase-3/7 activity assay | Caspase activation | Confirm apoptosis induction or inhibition |
| TUNEL staining | DNA fragmentation | Detect apoptosis in tissue sections |
| CRISPR knockout screening | Gene essentiality for survival | Identify negative regulators of apoptosis |
| RNA-seq | Transcriptional changes | Compare wild-type vs. knockout bone marrow cells |
| Proteomics | Protein expression and modifications | Discover survival signaling networks |
| Bone marrow transplantation | Hematopoietic reconstitution capacity | Assess functional impact of survival genes in vivo |
| Exosome isolation and treatment | Paracrine effects on apoptosis | Study mesenchymal stem cell-mediated survival |
Apoptosis Assays
Annexin V/PI staining followed by flow cytometry is the standard method to quantify apoptosis in bone marrow cells. Caspase activity assays and TUNEL staining are also used to detect apoptotic cells. These methods are essential to measure the effect of genetic perturbations on negative regulation of apoptosis.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that negatively regulate apoptosis in bone marrow cells. Cells are transduced with a library, treated with apoptotic stimuli, and surviving cells are sequenced to identify enriched sgRNAs. This approach has been used to discover novel survival factors.
Transcriptomics and Proteomics
RNA-seq and proteomics can reveal changes in gene expression and protein abundance upon modulation of candidate genes. For example, comparing wild-type and knockout bone marrow cells can identify pathways that cooperate to suppress apoptosis.
In Vivo Models
Mouse models with conditional knockouts or knock-ins in hematopoietic cells are used to study the role of specific genes in bone marrow apoptosis. Bone marrow transplantation assays can assess the functional impact of these genes on hematopoietic reconstitution.
How CRISPR Can Be Used to Study GO:0071866 negative regulation of apoptotic process in bone marrow cell
Knockout
CRISPR knockout of candidate genes in bone marrow cells can determine whether they are required for negative regulation of apoptosis. For example, knocking out Latexin or autophagy genes increases apoptosis, confirming their protective roles.
Point Mutation
Introducing specific point mutations via CRISPR can mimic disease-associated variants or disrupt functional domains. This helps dissect the precise molecular mechanisms by which a gene regulates apoptosis in bone marrow cells.
Knock-in
Knock-in of reporter tags (e.g., GFP) or epitope tags allows visualization and tracking of endogenous proteins. This is useful to study the localization and dynamics of anti-apoptotic proteins in bone marrow cells.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can enhance gene expression to test whether a gene is sufficient to protect bone marrow cells from apoptosis. This approach can identify therapeutic targets for marrow failure.
How EDITGENE Supports negative regulation of apoptotic process in bone marrow cell Research
Researchers studying negative regulation of apoptotic process in bone marrow cell-related genes often need to determine whether a candidate gene is causally involved in cell survival. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery, from knockout to overexpression and library screening.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of apoptotic process in bone marrow cell research.
Frequently Asked Questions About negative regulation of apoptotic process in bone marrow cell
What is GO:0071866?
GO:0071866 is a Gene Ontology term for any process that stops, prevents, or reduces the frequency or rate of apoptosis in bone marrow cells.
What genes are involved in negative regulation of apoptotic process in bone marrow cell?
Key genes include LTXN (Latexin), ATG5, ATG7, BCL2, MCL1, and IFNGR1, among others.
Why is negative regulation of apoptosis important in bone marrow?
It maintains the hematopoietic stem cell pool and prevents bone marrow failure, while dysregulation can lead to leukemia or cytopenias.
How does autophagy regulate apoptosis in bone marrow cells?
Autophagy prevents apoptosis of neutrophil precursors by recycling damaged components; disruption leads to increased cell death.
What diseases are associated with defective negative regulation of apoptosis in bone marrow?
Aplastic anemia, myelodysplastic syndromes, and leukemia are linked to altered apoptosis regulation in the bone marrow.
How can CRISPR be used to study this process?
CRISPR knockout, knock-in, and overexpression models allow researchers to test the causal role of specific genes in bone marrow cell survival.
What is the role of Latexin in bone marrow cell apoptosis?
Latexin supports hematopoietic stem cell quiescence and survival by inhibiting proteases that trigger apoptosis.
How does IFN-γ affect bone marrow cell apoptosis?
IFN-γ promotes apoptosis of hematopoietic cells and is a key mediator of immune-mediated bone marrow failure.
Can bone marrow mesenchymal stem cells protect against apoptosis?
Yes, mesenchymal stem cell-derived exosomes can modulate apoptosis in target cells, suggesting a protective role.
What methods are used to measure apoptosis in bone marrow cells?
Flow cytometry with Annexin V/PI, caspase activity assays, and TUNEL staining are commonly used.
Conclusion
GO:0071866, negative regulation of apoptotic process in bone marrow cell, is a critical biological process that safeguards hematopoietic cell survival. Its dysregulation contributes to bone marrow failure, leukemia, and other hematological disorders. Understanding the genes and mechanisms involved, such as Latexin, autophagy, and cytokine signaling, offers opportunities for therapeutic intervention. CRISPR-based models and screening approaches are powerful tools to dissect this process and identify new targets. EDITGENE provides end-to-end services to support such research, from knockout to overexpression and bioinformatics.
References
- 1. Zhang C et al.. 2018. Latexin and hematopoiesis.. Curr Opin Hematol 25(4):266-272 PMID: 29608488
- 2. Lorigados CB et al.. 2019. Bone Marrow Cells Transplant in Septic Mice Modulates Systemic Inflammatory Response via Cell-Cell Contact.. Shock 51(3):381-388 PMID: 29621118
- 3. Rožman S et al.. 2015. The generation of neutrophils in the bone marrow is controlled by autophagy.. Cell Death Differ 22(3):445-56 PMID: 25323583
- 4. Roodman GD. 2006. Regulation of osteoclast differentiation.. Ann N Y Acad Sci 1068:100-9 PMID: 16831910
- 5. Shen X et al.. 2023. Bone marrow mesenchymal stem cell exosome-derived lncRNA TUC339 influences the progression of osteoarthritis by regulating synovial macrophage polarization and chondrocyte apoptosis.. Biomed Pharmacother 167:115488 PMID: 37729727
- 6. Zhang YG et al.. 2010. Effect of negative pressure on human bone marrow mesenchymal stem cells in vitro.. Connect Tissue Res 51(1):14-21 PMID: 20067412
- 7. Chen J et al.. 2015. IFN-γ-mediated hematopoietic cell destruction in murine models of immune-mediated bone marrow failure.. Blood 126(24):2621-31 PMID: 26491068
- 8. Passos GA et al.. 2018. Update on Aire and thymic negative selection.. Immunology 153(1):10-20 PMID: 28871661
