Impact of neonatal sertraline exposure on the post-myocardial infarction outcomes of adult male mice.
Neonatal exposure to a selective serotonin reuptake inhibitor (SSRI) leads to decreased left ventricular volumes and sympathetic activation in adult mice. We hypothesized this neonatal SSRI exposure-induced small left heart syndrome would increase post-myocardial infarction (MI) morbidity and mortality. C57BL/6 mice received saline or sertraline (5 mg/kg intraperitoneally) on postnatal days 1-14. At 5 months, male mice underwent coronary artery ligation and were monitored by radiotelemetry until death or 4 weeks after ligation. After ligation, SSRI-exposed mice had increased heart rates (SSRI, 516 ± 13 bpm; control, 470 ± 15 bpm; P < 0.05). SSRI-exposed mice had significant reductions in left ventricular systolic volumes both before and after coronary ligation (SSRI: baseline = 20 ± 3 μL, post-MI = 37 ± 10 μL; control: baseline = 30 ± 3 μL, post-MI = 65 ± 23 μL). Post-MI echocardiography showed significantly decreased ejection fraction in control mice (baseline = 60% ± 4%, post-MI = 41% ± 2%, P < 0.01) but not the SSRI-exposed mice (baseline = 65% ± 3%, post-MI = 53% ± 7%). Neonatal SSRI exposure did not significantly alter post-MI survival. We conclude that the preexisting SSRI-induced small left heart syndrome may provide protection from post-MI ventricular dilation.
Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, IA.
Sarah E
SE
Haskell
Veronica A
VA
Peotta
Benjamin E
BE
Reinking
Gregory M
GM
Hermann
Robert D
RD
Roghair
D000818:Animals; D000831:Animals, Newborn; D004195:Disease Models, Animal; D004452:Echocardiography; D018636:Hypoplastic Left Heart Syndrome / Q000139:chemically induced* / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009203:Myocardial Infarction / Q000401:mortality / Q000503:physiopathology*; D017367:Selective Serotonin Reuptake Inhibitors / Q000008:administration & dosage / Q000009:adverse effects*; D020280:Sertraline / Q000008:administration & dosage / Q000009:adverse effects*; D015996:Survival Rate; D013686:Telemetry; D013997:Time Factors
D017367:Selective Serotonin Reuptake Inhibitors; D020280:Sertraline