Cystatin F-a key player in central nervous system disease
Abstract Cystatin F is an endogenous cysteine protease inhibitor that belongs to the type II cystatin family. It has several unique characteristic structures that determine some of its specific functions. Cystatin F is expressed predominantly in peripheral immune cells and in the microglia of the ce...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2025-08-01
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| Series: | Journal of Neuroinflammation |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12974-025-03526-z |
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| Summary: | Abstract Cystatin F is an endogenous cysteine protease inhibitor that belongs to the type II cystatin family. It has several unique characteristic structures that determine some of its specific functions. Cystatin F is expressed predominantly in peripheral immune cells and in the microglia of the central nervous system (CNS). Under physiological conditions, the expression of cystatin F in the CNS is minimal. However, emerging evidence suggests that it is significantly upregulated in several CNS diseases. Intriguingly, the role of cystatin F differs across disease contexts—serving a neuroprotective function while promoting pathological progression. Moreover, its function may shift across different pathological stages within the same disorder, reflecting a multifaceted pathophysiology. Cystatin F primarily acts by modulating neuroinflammation, clearing debris, and orchestrating immune responses via its selective expression in disease-associated microglia. As a vital player in CNS diseases, various intervention strategies targeting cystatin F have been proposed, including receptor-interacting protein kinase 1 pathway inhibition, miRNA targeting, mRNA stabilization, necroptosis inhibition, transcriptional regulation and upstream pathway modulation. Several approaches have yielded encouraging results in preclinical models, underscoring the therapeutic potential of modulating cystatin F activity. This review provides a comprehensive overview of the structural features, biological functions, and diverse roles of cystatin F in CNS diseases, including Alzheimer’s disease, multiple sclerosis, Parkinson’s disease, amyotrophic lateral sclerosis, stroke, Aicardi–Goutières syndrome, prion disease, and glioblastoma. Recent advances in therapeutic interventions focusing on cystatin F have been critically assessed, and key challenges related to clinical translation are outlined, offering new perspectives on therapeutic directions. |
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| ISSN: | 1742-2094 |