Fabp3 (Fatty Acid Binding Protein 3) Biomarker is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
FABP3 (Fatty Acid Binding Protein 3), also known as Heart-type Fatty Acid Binding Protein (H-FABP), is a cytoplasmic protein expressed primarily in cardiac and skeletal muscle, as well as in neurons. In the context of neurodegeneration, FABP3 serves as a biomarker for neuronal injury and has shown utility in detecting neuronal damage in Alzheimer's disease, Parkinson's disease, and other neurodegenerative conditions.
| Property | Value |
|---|---|
| Category | Neuronal Injury Biomarker |
| Target | Neuronal Damage / Cell Death |
| Sample Type | CSF, Blood (serum/plasma) |
| Diseases | Alzheimer's Disease, Parkinson's Disease, ALS, Stroke, TBI |
| Normal Range | CSF: 0.5-2 ng/mL; Serum: 2-6 ng/mL |
FABP3 is a small cytosolic protein (~15 kDa) belonging to the FABP family:
In the central nervous system:
FABP3 is released into extracellular space upon:
In AD, FABP3 is elevated and reflects synaptic and neuronal loss:
In PD:
In ALS:
FABP3 shows moderate diagnostic utility:
| Comparison | Sensitivity | Specificity | AUC |
|---|---|---|---|
| AD vs. Controls | 65-75% | 60-70% | 0.70-0.78 |
| PD vs. Controls | 60-70% | 55-65% | 0.65-0.75 |
| ALS vs. Controls | 75-85% | 70-80% | 0.80-0.88 |
FABP3 is most useful as a complementary biomarker:
| Method | Advantages | Limitations |
|---|---|---|
| ELISA | Standard method, high specificity | Moderate sensitivity |
| Simoa | Ultra-sensitive, low sample volume | Limited availability |
| Mass Spectrometry | High specificity, multi-analyte | Complex, expensive |
FABP3 is one of several neuronal injury biomarkers:
| Biomarker | Primary Source | Best For |
|---|---|---|
| NfL | Axonal degeneration | ALS, MS, FTD |
| Neurogranin | Synaptic loss | AD |
| FABP3 | Neuronal injury | AD, PD, ALS |
| Tau | Axonal damage | AD |
| UCH-L1 | Neuronal death | TBI, stroke |
FABP3 complements these markers by providing unique insight into neuronal membrane integrity.
While FABP3 is primarily a biomarker, it informs therapeutic development:
FABP3 is linked to the following topics:
The study of Fabp3 (Fatty Acid Binding Protein 3) Biomarker has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
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