Antithrombotic Therapy in Peripheral Arterial Disease:Risk Stratification and Clinical Decision Making

Essential oil from Fructus Alpinia zerumbet ameliorates atherosclerosis by activating PPARγ-LXRα-ABCA1/G1 signaling pathway

BACKGROUND

Atherosclerosis (AS) is a progressive chronic disease. Currently, cardiovascular diseases (CVDs) caused by AS is responsible for the global increased mortality. Yanshanjiang as miao herb in Guizhou of China is the dried and ripe fruit of Fructus Alpinia zerumbet. Accumulated evidences have confirmed that Yanshanjiang could ameliorate CVDs, including AS. Nevertheless, its effect and mechanism on AS are still largely unknown.

PURPOSE

To investigate the role of essential oil from Fructus Alpinia zerumbet (EOFAZ) on AS, and the potential mechanism.

METHODS

A high-fat diet (HFD) ApoE-/- mice model of AS and a oxLDL-induced model of macrophage-derived foam cells (MFCs) were reproduced to investigate the pharmacological properties of EOFAZ on AS in vivo and foam cell formation in vitro, respectively. The underlying mechanisms of EOFAZ were investigated using Network pharmacology and molecular docking. EOFAZ effect on PPARγ protein stability was measured using a cellular thermal shift assay (CETSA). Pharmacological agonists and inhibitors and gene interventions were employed for clarifying EOFAZ's potential mechanism.

RESULTS

EOFAZ attenuated AS progression in HFD ApoE-/- mice. This attenuation was manifested by the reduced aortic intima plaque development, increased collagen content in aortic plaques, notable improvement in lipid profiles, and decreased levels of inflammatory factors. Moreover, EOFAZ inhibited the formation of MFCs by enhancing cholesterol efflux through activiting the PPARγ-LXRα-ABCA1/G1 pathway. Interestingly, the pharmacological knockdown of PPARγ impaired the beneficial effects of EOFAZ on MFCs. Additionally, our results indicated that EOFAZ reduced the ubiquitination degradation of PPARγ, and the chemical composition of EOFAZ directly bound to the PPARγ protein, thereby increasing its stability. Finally, PPARγ knockdown mitigated the protective effects of EOFAZ on AS in HFD ApoE-/- mice.

CONCLUSION

These findings represent the first confirmation of EOFAZ's in vivo anti-atherosclerotic effects in ApoE-/- mice. Mechanistically, its chemical constituents can directly bind to PPARγ protein, enhancing its stability, while reducing PPARγ ubiquitination degradation, thereby inhibiting foam cell formation via activation of the PPARγ-LXRα-ABCA1/G1 pathway. Simultaneously, EOFAZ could ameliorates blood lipid metabolism and inflammatory microenvironment, thus synergistically exerting its anti-atherosclerotic effects.

Comparison of rivaroxaban-based dual antithrombotic and antiplatelet therapies for symptomatic patients with lower-extremity peripheral artery disease post-revascularization: a retrospective cohort study

Background

Patients with symptomatic lower-extremity peripheral artery disease (LE-PAD) are prone to serious cardiovascular and limb events. Few studies have evaluated the effect of rivaroxaban-based dual antithrombotic therapy in high-risk patients with LE-PAD in Asian populations.

Objectives

To investigate the efficacy and safety of rivaroxaban-based dual antithrombotic therapy in symptomatic patients with LE-PAD.

Design

Retrospective cohort study.

Methods

This study included patients with LE-PAD treated at the Nanjing Drum Tower Hospital from 1 January 2018 to 31 December 2021. These participants were divided into antiplatelet (APT) or antiplatelet therapy combined with rivaroxaban (RAPT) groups. The efficacy outcomes in this study were the occurrence of major adverse cardiovascular events (MACE), including myocardial infarction, ischemic stroke, or death from cardiovascular causes, and major adverse limb events (MALE), including urgent revascularization, acute limb ischemia, and major amputation. The safety outcomes included major and clinically relevant non-major (CRNM) bleeding. Patients were followed up until the time of death or the end of the study (31 March 2023).

Results

We included 1144 patients with LE-PAD (APT: 502 patients; RAPT: 642 patients). The RAPT group had a lower risk of primary composite efficacy outcomes [hazard ratio (HR): 0.40] and a nonsignificant increase in major bleeding risk (HR: 2.33) than the APT group. The RATP group also had a significantly lower risk of secondary efficacy outcomes, including ischemic stroke (HR: 0.41), myocardial infarction (HR: 0.31), cardiovascular death (HR: 0.40), and MALE (HR: 0.65), than the APT group. The CRNM bleeding incidence varied between the two groups (HR: 3.96). Moreover, no significant interactions were observed between the subgroups and treatment groups in the composite efficacy analysis.

Conclusion

Rivaroxaban-based dual antithrombotic therapy significantly reduced the occurrence of MACE in patients with LE-PAD without increasing major bleeding events. High-risk patients benefited from the dual antithrombotic therapy.

Evolution in Trends of Primary Lower-Extremity Amputations Associated With Diabetes or Peripheral Artery Disease From 2006 to 2019

BACKGROUND

Given the importance in prevention of lower extremity amputations (LEAs) associated with diabetes or peripheral artery disease (PAD), we sought to document the trends of primary LEA in Québec, Canada, from years 2006 to 2019.

METHODS

Using the Québec Integrated Chronic Disease Surveillance System, we calculated crude and age-standardized annual incidence rates of primary LEA associated with diabetes and PAD among adults ≥ 40 years (99% confidence intervals [CI]), and all-cause 1-year mortality proportion trends following a primary LEA (95% CI), stratified by minor or major as the highest level of LEA during the same hospital stay and age groups. Trends were assessed using multivariate regression models.

RESULTS

In 2019, the crude rate of primary LEA was 116.0 per 100,000 (n = 825) with 93.7 and 21.9 per 100,000 of minor (n = 665) and major (n = 160) LEA, respectively. A tendency of decrease by 8% (-15.0 to 0.4%) of age-standardized incidence of primary LEA was observed between 2006 and 2019, while the absolute number of primary LEA increased from 610 to 825 cases. Minor LEA increased by 14.2% (3.7 to 25.9%) and major LEA decreased by 49.5% (-57.1 to -40.5%). Incidence trends remained stable among the 40 to 64 years, and declined by 14.6% and 20.1% for the 65 to 79 and ≥ 80 years of age groups, respectively. Major LEA decreased in all age groups, whereas minor LEA increased by 26.2% among the patients 40 to 64 years of age only. Age-standardized 1-year mortality decreased by 35.1% (95% CI, -43.4 to -25.7%) between 2006 and 2019, with a crude 1-year mortality of 11.3% in 2019.

CONCLUSIONS

The reduction of major LEA and 1-year mortality are encouraging, although increased minor LEA, especially in younger age groups, emphasizes the importance to improve preventive care further.

Clinical Profile and Management of Patient Patients with Ischemic Heart Disease and/or Peripheral Artery Disease in Clinical Practice: The APALUSA Study

This study was aimed to ascertain the clinical profile and management of patients with ischemic heart disease (IHD) and/or peripheral artery disease (PAD). In this observational and cross-sectional study developed in 80 hospitals throughout Spain, consecutive adults with stable IHD and/or PAD were included. A total of 1089 patients were analyzed, of whom 65.3% had only IHD, 17.8% PAD and 16.9% both. A total of 80.6% were taking only one antiplatelet agent, and 18.2% were on dual antiplatelet therapy (mainly aspirin/clopidogrel). Almost all patients were taking ≥1 lipid lowering drug, mainly moderate-to-high intensity statins. IHD patients took ezetimibe more commonly than PAD (43.9% vs. 12.9%; p < 0.001). There were more patients with IHD that achieved blood pressure targets compared to PAD (<140/90 mmHg: 67.9% vs. 43.0%; p < 0.001; <130/80 mmHg: 34.1% vs. 15.7%; p < 0.001), LDL-cholesterol (<70 mg/dL: 53.1% vs. 41.5%; p = 0.033; <55 mg/dL: 26.5% vs. 16.0%; p = 0.025), and diabetes (HbA1c < 7%, with SGLT2i/GLP1-RA: 21.7% vs. 8.8%; p = 0.032). Modifications of antihypertensive agents and lipid-lowering therapy were performed in 69.0% and 82.3% of patients, respectively, without significant differences between groups. The use of SGLT2i/GLP1-RA was low. In conclusion, cardiovascular risk factors control remains poor among patients with IHD, PAD, or both. A higher use of combined therapy is warranted.