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Published on: May 24, 2024
Exploring the roles of SPARC as a proinflammatory factor and its potential as a novel therapeutic target against
Hiroe Toba1,2, Shinji Takai2
1Division of Pathological Sciences, Department of Clinical Pharmacology, Kyoto Pharmaceutical University, Kyoto, Japan.
Abstract:
Cardiovascular disease (CVD) is a leading cause of death worldwide, and the number of patients with CVD continues to increase despite extensive research and developments in this field. Chronic inflammation is a pivotal pathological component of CVD, and unveiling new proinflammatory factors will help devise novel preventive and therapeutic strategies. The extracellular matrix (ECM) not only provides structural support between cells but also contributes to cellular functions. Secreted protein acidic and rich in cysteine (SPARC) is a collagen-binding matricellular protein that is particularly induced during development and tissue remodeling. A proinflammatory role for SPARC has been demonstrated in various animal models, such as in the lipopolysaccharide-induced footpad model and dextran sodium sulfate-induced colitis model. Recent clinical studies reported a positive correlation between elevated plasma SPARC levels and hypertension, obesity, and the inflammatory marker high-sensitive C-reactive protein. In addition, SPARC gene deletion attenuates the cardiac injury induced by aging, myocardial infarction, and pressure load, suggesting that SPARC has deleterious effects on CVD. This review summarizes the regulatory and proinflammatory mechanisms of SPARC on CVD, chronic kidney disease (CKD), and cerebrovascular disease and discusses the rationale behind measuring SPARC as a biomarker of CVD and the effects of inhibition of SPARC in the prevention and treatment of CVD.
Insights
Secreted protein acidic and rich in cysteine (SPARC) promotes inflammation and cardiovascular disease (CVD). Inhibiting SPARC may offer new strategies for preventing and treating CVD and related conditions.
Area of Science:
- Cardiovascular research
- Inflammation biology
- Extracellular matrix proteins
Background:
- Cardiovascular disease (CVD) remains a leading global cause of mortality, with increasing patient numbers.
- Chronic inflammation is a key pathological factor in CVD development and progression.
- The extracellular matrix (ECM) protein, secreted protein acidic and rich in cysteine (SPARC), is implicated in tissue remodeling and inflammation.
Purpose of the Study:
- To review the regulatory and proinflammatory mechanisms of SPARC in cardiovascular disease (CVD), chronic kidney disease (CKD), and cerebrovascular disease.
- To discuss the potential of SPARC as a biomarker for CVD.
- To explore the therapeutic implications of SPARC inhibition for CVD prevention and treatment.
Main Methods:
- Review of existing literature on SPARC's role in inflammatory and cardiovascular conditions.
- Analysis of preclinical animal models demonstrating SPARC's proinflammatory effects.
- Examination of clinical studies correlating SPARC levels with CVD risk factors and inflammatory markers.
Main Results:
- SPARC exhibits a proinflammatory role in various disease models.
- Elevated plasma SPARC levels are associated with hypertension, obesity, and inflammation.
- SPARC deficiency protects against cardiac injury, suggesting detrimental effects in CVD.
Conclusions:
- SPARC plays a significant role in the pathogenesis of CVD and related diseases.
- SPARC presents a potential biomarker for CVD risk assessment.
- Targeting SPARC offers a promising therapeutic avenue for managing cardiovascular and related inflammatory conditions.
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