Rosuvastatin and Mean Platelet Volume in Diabetes

The Prognostic Utility of Mean Platelet Volume in Patients With Acute Coronary Syndrome: A Systematic Review With Meta-Analyses

Mean platelet volume (MPV) is a hematological index that is routinely measured in clinical settings. Although many studies have been conducted to investigate the prognostic significance of MPV in acute coronary syndromes (ACS), the findings have been inconsistent. The goal of this study was to systematically review all current evidence on the association between admission MPV and clinical outcomes after ACS. PubMed, Scopus, Web of Science, and other databases were searched. The primary endpoints were major adverse cardiovascular events (MACE) and mortality. We applied a Knapp and Hartung adjustment, prediction interval calculations and permutation tests during pairwise meta-analyses. A one-stage dose-response meta-analysis was also conducted. The meta-analysis consisted of 41 studies with 33443 participants. Mean platelet volume, as a continuous variable, was associated with the risk of long-term mortality (hazard ratio 1.33, 95% CI 1.19-1.48). After conducting permutation tests and calculation of prediction intervals, this association remained significant. The results for MACE were nonsignificant. Linear models were the best fitted models during dose-response meta-analyses, trends for nonlinearity were significant for long-term endpoints. Admission MPV was associated with long-term mortality in ACS patients, with nonlinear associations between MPV levels and long-term clinical outcomes.

Mean platelet volume and coronary artery disease

PURPOSE OF REVIEW

To critically review the literature describing links between mean platelet volume (MPV) and cardiovascular disease (CVD). We will focus on coronary artery disease (CAD). The MPV is measured routinely as part of a routine blood count.

RECENT FINDINGS

There is accumulating evidence showing that the MPV may predict CVD, as well as outcomes in patients with CAD. There is also evidence linking MPV and comorbidities (e.g. diabetes mellitus and impaired glycaemic control) that are expected in patients with CAD. The effect on MPV of drugs commonly used to treat CAD has not been clarified, but there is some evidence that they may exert a beneficial effect on the MPV. More specifically, the MPV may predict the effect of antiplatelet drugs (e.g. clopidogrel). There is also evidence relating MPV to stroke, atrial fibrillation, coronary artery ectasia and periprocedural outcomes after percutaneous coronary intervention (PCI).

SUMMARY

Measuring the MPV may prove useful in CVD risk assessment in patients with established CAD or at risk of developing CAD. Overall, there is evidence pointing to the role of MPV as a contributor rather than simple marker of CVD.

The relationship between mean platelet volume and diabetic retinopathy: a systematic review and meta-analysis

BACKGROUND

Diabetic retinopathy (DR) is one of the most common diseases causing blindness in the world, and most patients are already in advanced stage. Recent years, many studies reported mean platelet volume (MPV) may be associated with development of DR, but there was no consistent conclusion reached.

METHODS

Literature was retrieved by formally searching PubMed, Embase, Cochrane library and Scopus and by hand searching of reference lists of related articles. Finally, a total of 14 literatures included, and Review manager 5.3 and STATA 14.0 statistical software were utilized for processing.

RESULTS

Meta-analysis showed that MPV values in DR were significantly higher than health controls [SMD (95% CI) = 0.92 (0.60-1.24)] and type 2 diabetes mellitus without diabetic retinopathy (T2DM without DR) [SMD (95% CI) = 0.36 (0.19-0.53)]. Subgroup analysis indicated that MPV level in proliferative diabetic retinopathy (PDR) patients was higher than T2DM without DR patients [SMD (95% CI) = 0.48 (0.28, 0.68)], but this difference didn't appear in non-proliferative diabetic retinopathy (NPDR).

CONCLUSIONS

The study demonstrated that increased MPV level was significant associated with the development of DR, and it might reflect the severity of DR, which could be provided to monitor development and progression of DR clinically.

Impact of statin therapy on the immature platelet count in patients with coronary artery disease: A single centre cohort study

BACKGROUND

Statins represent a pivotal therapy among patients with coronary artery disease (CAD), providing both lipid-lowering and pleiotropic, anti-thrombotic and anti-inflammatory benefits. Immature platelet count (IPC) has been proposed as the fraction of younger and potentially more reactive platelets, therefore potentially affecting the risk of major cardiovascular ischemic events. The aim of the present study was to evaluate the impact of statin therapy on IPC in patients with CAD.

METHODS

Patients undergoing coronary angiography in a single centre were included. IPC levels were measured by routine blood cells count (A Sysmex XE-2100) as the product of immature platelet fraction (IPF) and platelet count, in patients naïve or chronically treated with statins at admission.

RESULTS

We included in our study 642 patients, 61.2% treated with statins at admission. Patients on chronic statins were more often males, with a worse metabolic profile, but for lower total and LDL cholesterol, and a higher prevalence of major cardiovascular risk factors. The mean levels of IPC did not differ between statin treated and naive patients (7.9 ± 4.7 vs 7.7 ± 5, p = 0.60) and neither the distribution of IPC across tertiles (p = 0.36). In fact, at multivariate regression analysis, statin use was not independently associated with the rate of IPC above the 3rd tertile (adjusted OR[95%CI] = 1.19[0.80-1.79], p = 0.39). Moreover, among the 190 patients that introduced the therapy with statins at admission, the levels of IPC and major platelet parameters did not differ at a median follow-up of 32 days, as compared to chronically treated or non-treated patients.

CONCLUSION

The present study shows that among patients with CAD the use of statins does not affect the immature platelet count or main platelet parameters.