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Metal-dependent protein phosphatase 1A: A potential therapeutic target in fibrotic disorders
Yu Zhang1, Hanghang Wang1, Zecheng Jin1
1Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
Abstract:
Metal-dependent protein phosphatase 1A (PPM1A), a ubiquitously distributed member of the phosphatase superfamily, serves as a crucial signaling modulator through its capacity to dephosphorylate multiple nodal proteins in cellular transduction pathways. Localized to both cytoplasmic and nuclear compartments, PPM1A has emerged as a central negative regulator of key fibrotic and inflammatory cascades, such as transforming growth factor-β (TGF-β), nuclear factor-kappa-B (NF-κB), and mitogen-activated protein kinase (MAPK) pathways. Substantial evidence demonstrates that PPM1A modulates injury responses by attenuating TGF-β-mediated extracellular matrix (ECM) production, inhibiting fibroblast-to- myofibroblast transformation, and restoring tissue homeostasis across multiple organ systems. Research on its activity and status has positioned it as a promising therapeutic target for fibrotic implications. This review provides a comprehensive overview of structural determinants of PPM1A function, its multifaceted roles in cellular physiology, the pathological consequences of PPM1A dysregulation, and current progress in developing PPM1A-targeted therapies.
Insights
Metal-dependent protein phosphatase 1A (PPM1A) regulates key cellular pathways, acting as a crucial negative regulator of fibrosis and inflammation. Targeting PPM1A shows promise for treating fibrotic diseases by restoring tissue homeostasis.
Area of Science:
- Biochemistry
- Cellular Biology
- Molecular Medicine
Background:
- Metal-dependent protein phosphatase 1A (PPM1A) is a ubiquitous phosphatase superfamily member involved in cellular signaling.
- PPM1A acts as a negative regulator of fibrotic and inflammatory pathways, including TGF-β, NF-κB, and MAPK.
- Its roles in modulating injury responses and maintaining tissue homeostasis are increasingly recognized.
Purpose of the Study:
- To provide a comprehensive overview of PPM1A's structure-function relationships.
- To elucidate the multifaceted roles of PPM1A in cellular physiology and pathology.
- To review current advancements in PPM1A-targeted therapeutic strategies for fibrotic diseases.
Main Methods:
- Literature review of structural determinants of PPM1A function.
- Analysis of PPM1A's regulatory roles in key signaling cascades (TGF-β, NF-κB, MAPK).
- Examination of PPM1A's impact on extracellular matrix production and fibroblast differentiation.
Main Results:
- PPM1A attenuates TGF-β-mediated extracellular matrix production.
- PPM1A inhibits fibroblast-to-myofibroblast transformation, crucial in fibrotic processes.
- PPM1A dysregulation is linked to pathological fibrotic conditions across multiple organs.
Conclusions:
- PPM1A is a critical modulator of fibrotic and inflammatory responses.
- PPM1A's function is influenced by its structural determinants.
- Targeting PPM1A represents a promising therapeutic avenue for fibrotic diseases.
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