What does this research mean for the field?

In-stent restenosis is associated with a coordinated peripheral blood MMP-2/TIMP-2 imbalance characterized by increased MMP-2 and decreased TIMP-2 at both the mRNA and circulating protein levels. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

January 1, 2026Journal of Medical BiochemistryOpen Access

Molecular and biochemical characterisation of peripheral blood MMP-2 upregulation and TIMP-2 downregulation in in-stent restenosis

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Why the study?

Most studies have focused on either circulating protein levels or mRNA expression alone, whereas paired cross-level analysis of PBMC mRNA and plasma protein may better characterise peripheral blood MMP-2/TIMP-2 dysregulation in in-stent restenosis.

Structured PICO

Population

117 patients evaluated 6-12 months after coronary stent implantation, comprising 42 patients with in-stent restenosis (ISR) and 75 without ISR.

Comparator

Patients without in-stent restenosis (n=75)

Outcome

Plasma MMP-2 and TIMP-2 concentrations (measured by ELISA) and mRNA expression levels in peripheral blood mononuclear cells (measured by qPCR)surrogate

In-stent restenosis is associated with a peripheral blood MMP-2/TIMP-2 imbalance, suggesting these biomarkers reflect matrix remodeling in ISR.

Discussion

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Implication

Paired MMP-2/TIMP-2 profiling in ISR; leaves open whether it predicts events or informs therapy in observational data.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/6a895a7f4c30e1095aec6cda https://doi.org/10.5937/jomb0-67085

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