Subtopic Deep Dive
GFI1 in Neutropenia
Research Guide
What is GFI1 in Neutropenia?
GFI1 in Neutropenia studies mutations in the GFI1 transcription factor that disrupt granulopoiesis, causing severe congenital neutropenia through dominant-negative effects and altered gene dosage.
GFI1 mutations were first identified in neutropenia patients by Person et al. (2003, 385 citations), showing they target ELA2 expression. Xia et al. (2009, 163 citations) found GFI1 mutations in 7% of severe congenital neutropenia cases alongside ELANE, HAX1, and others. Over 10 papers detail GFI1's role in neutrophil differentiation defects.
Why It Matters
GFI1 mutations explain 5-10% of severe congenital neutropenia cases, guiding genetic screening as in Xia et al. (2009). Person et al. (2003) linked GFI1 variants to ELA2 dysregulation, informing G-CSF treatment responses. Möröy et al. (2015, 111 citations) connect GFI1 dosage to leukemia risk in neutropenic patients, impacting prognosis and therapy.
Key Research Challenges
Detecting Dominant-Negative Effects
GFI1 mutations act dominantly by repressing wild-type function, complicating inheritance models (Person et al., 2003). Assays must distinguish haploinsufficiency from interference. Xia et al. (2009) highlight low mutation prevalence requiring large cohorts.
Quantifying Gene Dosage Impact
GFI1 haploinsufficiency disrupts myelopoiesis balance, but dosage thresholds vary (Velu et al., 2009, 161 citations). Functional studies need precise quantification. Möröy et al. (2015) note variable expressivity across patients.
Modeling Combined Inheritance
Neutropenia arises from GFI1-ELANE digenic patterns, challenging monogenic diagnosis (Horwitz et al., 2006, 243 citations). Segregation analysis in families is complex. Donadieu et al. (2011, 210 citations) stress multi-gene screening needs.
Essential Papers
The 2017 IUIS Phenotypic Classification for Primary Immunodeficiencies
Aziz Bousfiha, Leïla Jeddane, Capucine Pïcard et al. · 2017 · Journal of Clinical Immunology · 511 citations
Since the 1990s, the International Union of Immunological Societies (IUIS) PID expert committee (EC), now called Inborn Errors of Immunity Committee, has published every other year a classification...
Mutations in proto-oncogene GFI1 cause human neutropenia and target ELA2
Richard Person, Feng-Qian Li, Zhijun Duan et al. · 2003 · Nature Genetics · 385 citations
Neutrophil elastase in cyclic and severe congenital neutropenia
Marshall S. Horwitz, Zhijun Duan, Brice Korkmaz et al. · 2006 · Blood · 243 citations
Abstract Mutations in ELA2 encoding the neutrophil granule protease, neutrophil elastase (NE), are the major cause of the 2 main forms of hereditary neutropenia, cyclic neutropenia and severe conge...
Congenital neutropenia: diagnosis, molecular bases and patient management
Jean Donadieu, Odile Fenneteau, Blandine Beaupain et al. · 2011 · Orphanet Journal of Rare Diseases · 210 citations
The term congenital neutropenia encompasses a family of neutropenic disorders, both permanent and intermittent, severe (<0.5 G/l) or mild (between 0.5-1.5 G/l), which may also affect other organ sy...
Mutations of the ELA2 gene found in patients with severe congenital neutropenia induce the unfolded protein response and cellular apoptosis
David S. Grenda, Mark A. Murakami, Jhuma Ghatak et al. · 2007 · Blood · 201 citations
Severe congenital neutropenia (SCN) is an inborn disorder of granulopoiesis. Mutations of the ELA2 gene encoding neutrophil elastase (NE) are responsible for most cases of SCN and cyclic neutropeni...
Prevalence of mutations in <i>ELANE</i>, <i>GFI1</i>, <i>HAX1</i>, <i>SBDS</i>, <i>WAS</i> and <i>G6PC3</i> in patients with severe congenital neutropenia
Jun Xia, Audrey Anna Bolyard, Elin Rodger et al. · 2009 · British Journal of Haematology · 163 citations
Summary Severe congenital neutropenia (SCN) is a genetically heterogeneous syndrome associated with mutations of ELANE ( ELA2 ), HAX1 , GFI1 , WAS , CSF3R or G6PC3 . We investigated the prevalence ...
Gfi1 regulates miR-21 and miR-196b to control myelopoiesis
Chinavenmeni S. Velu, Avinash M. Baktula, H. Leighton Grimes · 2009 · Blood · 161 citations
Abstract The zinc finger protein growth factor independent-1 (Gfi1) is a transcriptional repressor that is critically required for normal granulocytic differentiation. GFI1 loss-of-function mutatio...
Reading Guide
Foundational Papers
Start with Person et al. (2003, 385 citations) for GFI1 mutation discovery and ELA2 targeting; then Xia et al. (2009, 163 citations) for prevalence in SCN cohorts.
Recent Advances
Study Möröy et al. (2015, 111 citations) for GFI1 dosage in leukemia transition; Bousfiha et al. (2017, 511 citations) for IUIS classification updates.
Core Methods
Mutation screening via sequencing (Xia et al., 2009); repression assays for dominant-negative effects (Person et al., 2003); miRNA quantification in Gfi1 models (Velu et al., 2009).
How PapersFlow Helps You Research GFI1 in Neutropenia
Discover & Search
Research Agent uses searchPapers('GFI1 neutropenia mutations') to find Person et al. (2003, 385 citations), then citationGraph to map 50+ citing works on granulopoiesis defects, and findSimilarPapers for ELANE-GFI1 interactions.
Analyze & Verify
Analysis Agent applies readPaperContent on Xia et al. (2009) to extract mutation prevalence (7% GFI1 cases), verifyResponse with CoVe against cohort data, and runPythonAnalysis to plot genotype-phenotype correlations using pandas on extracted tables, with GRADE scoring for evidence strength.
Synthesize & Write
Synthesis Agent detects gaps in digenic inheritance via contradiction flagging across Velu et al. (2009) and Möröy et al. (2015); Writing Agent uses latexEditText for review drafts, latexSyncCitations to integrate 20+ refs, and exportMermaid for GFI1-ELA2 pathway diagrams.
Use Cases
"Analyze GFI1 mutation frequencies in SCN cohorts with statistics"
Research Agent → searchPapers('GFI1 SCN prevalence') → Analysis Agent → readPaperContent(Xia 2009) → runPythonAnalysis(pandas tabulation of ELANE/GFI1/HAX1 rates) → CSV export of mutation stats table.
"Draft LaTeX review on GFI1 dominant-negative mechanisms"
Synthesis Agent → gap detection(Person 2003 + Velu 2009) → Writing Agent → latexEditText(structured sections) → latexSyncCitations(10 papers) → latexCompile(PDF) → outputs formatted manuscript with figures.
"Find code for GFI1 expression analysis in neutropenia models"
Research Agent → paperExtractUrls(Velu 2009) → paperFindGithubRepo → githubRepoInspect → outputs Python scripts for miR-21/196b quantification in myelopoiesis datasets.
Automated Workflows
Deep Research workflow scans 50+ papers via searchPapers and citationGraph, producing structured SCN gene reports with GFI1 sections. DeepScan applies 7-step CoVe to verify Person et al. (2003) ELA2 targeting claims against Xia et al. (2009) data. Theorizer generates hypotheses on GFI1 steroid responsiveness from Möröy et al. (2015).
Frequently Asked Questions
What defines GFI1-related neutropenia?
GFI1 mutations cause severe congenital neutropenia via dominant-negative disruption of granulopoiesis (Person et al., 2003). Prevalence is ~7% in SCN cohorts (Xia et al., 2009).
What methods study GFI1 mutations?
Sequencing screens ELANE/GFI1/HAX1 in SCN patients (Xia et al., 2009). Functional assays test ELA2 repression and miRNA regulation (Velu et al., 2009).
What are key papers on GFI1 neutropenia?
Person et al. (2003, 385 citations) discovered GFI1 mutations targeting ELA2. Xia et al. (2009, 163 citations) quantified prevalence. Möröy et al. (2015, 111 citations) links to leukemia risk.
What open problems exist?
Digenic GFI1-ELANE mechanisms need clarification (Horwitz et al., 2006). Variable steroid responses and leukemia progression models remain unresolved (Donadieu et al., 2011).
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