Tumor-Induced Cardiac Dysfunction: A Potential Role of ROS

Area of Science:

• Oncology
• Cardiology
• Molecular Biology

Background:

• Cancer and heart disease are leading global causes of death.
• Cancer patients often experience heart complications, typically attributed to treatments.
• The impact of tumors on heart function before treatment or cachexia is unclear.

Purpose of the Study:

• To investigate if tumor induction causes cardiac defects independently of cancer treatments or cachexia.
• To explore the role of the Hippo-Yorkie (Yki) pathway in cancer-related cardiac dysfunction.
• To establish a link between oncogenic pathways and systemic cardiac abnormalities.

Main Methods:

• Utilized complementary mouse and *Drosophila* models.
• Overexpressed the Hippo-Yorkie (Yki) pathway's transcriptional co-activator to induce cellular overgrowth.
• Administered antioxidant treatment to rescue observed cardiac phenotypes.

Main Results:

• Yki overexpression in *Drosophila* eye tissue led to compromised cardiac function.
• Cardiac dysfunction was rescued by antioxidant treatment, indicating a role for reactive oxygen species (ROS).
• Tumorigenesis via the Yki pathway induced systemic ROS increase, affecting heart function.

Conclusions:

• Abnormal cellular overgrowth or systemic cancer can cause cardiac dysfunction.
• The Hippo-Yorkie pathway is implicated in cancer-induced cardiac defects.
• Identifying cardiac defects linked to oncogenic pathways may enable early diagnosis of cardiac dysfunction in cancer patients.