Chronic Oxidative Stress as a Marker of Long-term Radiation-Induced Cardiovascular Outcomes in Breast Cancer

We examined associations of biomarkers of oxidative stress (myeloperoxidase, growth differentiation factor-15, 8-hydroxy-2'-deoxyguanosine [8-OH-dG], placental growth factor), cardiac injury (troponin I, cystatin-C), inflammation (interleukin-6, C-reactive protein), and myocardial fibrosis (transforming growth factor-ß) with long-term RICVD in breast cancer (BC) survivors. We conducted a nested case-control study within the Women's Health Initiative of postmenopausal women with incident BC stages I-III, who received radiation and had pre- and post-BC diagnosis serum samples. Cases (n = 55) were defined as developing incident, physician-adjudicated myocardial infarction, coronary heart disease death, other CVD death, heart failure, or stroke after BC. Cases were matched to three controls (n = 158). After adjustment, a higher 8-OH-dG ratio was significantly associated with an elevated long-term risk of RICVD, suggesting oxidative DNA damage may be a putative pathway for RICVD.PMID:36178659 | DOI:10.1007/s12265-022-10320-2

Source: Cancer Control - September 30, 2022 Category: Cancer & Oncology Authors: Alexi Vasbinder Richard K Cheng Susan R Heckbert Hilaire Thompson Oleg Zaslavksy Rowan T Chlebowski Aladdin H Shadyab Lisa Johnson Jean Wactawski-Wende Gretchen Wells Rachel Yung Lisa Warsinger Martin Electra D Paskett Kerryn Reding Source Type: research