Cardiac Imaging in Childhood Cancer Survivors: A State-of-the-Art Review

Circulating leptin is associated with adverse vascular changes in young adult survivors of childhood cancer

INTRODUCTION

Proteomics may help discover novel biomarkers and underlying mechanisms for cardiovascular disease. This could be useful for childhood cancer survivors as they show an increased risk of cardiovascular disease. The aim of this study was to investigate circulating cardiovascular proteins in young adult survivors of childhood cancer and their relationship to previously reported subclinical cardiovascular disease.

METHODS

Ninety-two cardiovascular proteins were measured in 57 childhood cancer survivors and in 52 controls. For proteins that were significantly different between childhood cancer survivors and controls, we performed correlations between protein levels and measures of peripheral arterial stiffness (carotid distensibility and stiffness index, and augmentation index) and endothelial dysfunction (reactive hyperemia index).

RESULTS

Leptin was significantly higher in childhood cancer survivors compared to controls (normalized protein expression units: childhood cancer survivors 6.4 (1.5) versus 5.1 (1.7), p < 0.0000001) after taking multiple tests into account. Kidney injury molecule-1, MER proto-oncogene tyrosine kinase, selectin P ligand, decorin, alpha-1-microglobulin/bikunin precursor protein, and pentraxin 3 showed a trend towards group differences (p < 0.05). Among childhood cancer survivors, leptin was associated with anthracycline treatment after adjustment for age, sex, and body mass index (p < 0.0001). Higher leptin correlated with lower carotid distensibility after adjustment for age, sex, body mass index, and treatments with radiotherapy and anthracyclines (p = 0.005).

CONCLUSION

This proteomics approach identified that leptin is higher in young asymptomatic adult survivors of childhood cancer than in healthy controls and is associated with adverse vascular changes. This could indicate a role for leptin in driving the cardiovascular disease burden in this population.

Screening and management of dyslipidemia in oncologic patients undergoing cardiotoxic therapies: results from an Italian survey

BACKGROUND

Baseline cardiovascular risk factors correction is recommended in all cancer patients undergoing potentially cardiotoxic therapies. Despite available guidelines, real-world data on dyslipidemia prevalence and management in the oncologic population are still sparse.

METHODS

This survey was an Italian, investigator-initiated survey initially designed and drafted by the Cardio-Oncology section of the Associazione Nazionale Medici Cardiologi Ospedalieri (ANMCO), comprising 10 individual multi-choice questions and spread after validation through the ANMCO mailing list. The survey was sent to cardiologists working in cardio-oncology units and/or managing patients with cancer.

RESULTS

Our survey included 139 Italian cardiologists. The majority of them routinely ask for the baseline lipidic profile of their patients, regardless of previous clinical history and planned treatment. According to our participants, the estimated prevalence of dyslipidemia in this population is between 20% and 60%. Although this high prevalence, our results highlight that there is poor harmony in terms of scores for CV risk prediction used in clinical practice to guide drug prescription and baseline therapy optimization. On the same line, coronary artery calcium score is poorly used in this setting. At the same time, more than 30% of interrogated physicians do not prescribe adequate statin doses, even though necessary, and have uncertainties on the use of other anti-dyslipidemic drugs in this population.

CONCLUSIONS

Our results highlight the necessity of strong evidences on dyslipidemia screening and management in the cancer population, as well as the need of knowledge diffusion from scientific societies to clinicians treating these patients.

Chimeric antigen receptor-T cell therapy-related cardiotoxicity in adults and children cancer patients: A clinical appraisal

Chimeric antigen receptor-T (CAR-T) cells therapies represent an innovative immunological treatment for patients suffering from advanced and refractory onco-hematological malignancies. The infusion of engineered T-cells, exposing chimeric receptors on the cell surface, leads to an immune response against the tumor cells. However, data from clinical trials and observational studies showed the occurrence of a constellation of adverse events related to CAR-T cells infusion, ranging from mild effects to life-threatening organ-specific complications. In particular, CAR-T cell-related cardiovascular toxicities represent an emerging group of adverse events observed in these patients, correlated with increased morbidity and mortality. Mechanisms involved are still under investigation, although the aberrant inflammatory activation observed in cytokine release syndrome (CRS) seems to play a pivotal role. The most frequently reported cardiac events, observed both in adults and in the pediatric population, are represented by hypotension, arrhythmias and left ventricular systolic dysfunction, sometimes associated with overt heart failure. Therefore, there is an increasing need to understand the pathophysiological basis of cardiotoxicity and risk factors related to its development, in order to identify most vulnerable patients requiring a close cardiological monitoring and long-term follow-up. This review aims at highlighting CAR-T cell-related cardiovascular complications and clarifying the pathogenetic mechanisms coming at play. Moreover, we will shed light on surveillance strategies and cardiotoxicity management protocols, as well as on future research perspectives in this expanding field.