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Effects of low-dose oxygen ions on cardiac function and structure in female C57BL/6J mice.
Nemec-Bakk, Ashley S; Sridharan, Vijayalakshmi; Landes, Reid D; Singh, Preeti; Cao, Maohua; Dominic, Paari; Seawright, John W; Chancellor, Jeffery C; Boerma, Marjan.
Afiliación
  • Nemec-Bakk AS; Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA. Electronic address: anemecbakk@uams.edu.
  • Sridharan V; Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
  • Landes RD; Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
  • Singh P; Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
  • Cao M; College of Dentistry, Texas A&M University, Dallas TX, USA.
  • Dominic P; Department of Medicine and Center of Excellence for Cardiovascular Diseases & Sciences, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
  • Seawright JW; McLennan Community College, Waco, TX, USA.
  • Chancellor JC; Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA, USA; Department of Preventative Medicine & Population Health, University of Texas Medical Branch, Galveston, TX, USA; Outer Space Institute, University of British Columbia, Vancouver, CA, Canada.
  • Boerma M; Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
Life Sci Space Res (Amst) ; 32: 105-112, 2022 Feb.
Article en En | MEDLINE | ID: mdl-35065756
PURPOSE: Astronauts in space vehicles beyond low-Earth orbit will be exposed to high charge and energy (HZE) ions, and there is concern about potential adverse effects on the cardiovascular system. Thus far, most animal studies that assess cardiac effects of HZE particles have included only males. This study assessed the effects of oxygen ions (16O) as a representative ion of the intravehicular radiation environment on the heart of female mice. MATERIALS AND METHODS: Female C57BL/6 J mice at 6 months of age were exposed to 16O (600 MeV/n) at 0.25-0.26 Gy/min to a total dose of 0, 0.1, or 0.25 Gy. Cardiac function and abdominal aorta blood velocity were measured with ultrasonography at 3, 5, 7, and 9 months after irradiation. At 2 weeks, 3 months, and 9 months, cardiac tissue was collected to assess collagen deposition and markers of immune cells. RESULTS: Ultrasonography revealed increased left ventricle mass, diastolic volume and diameter but there was no change in the abdominal aorta. There was no indication of cardiac fibrosis however, a 75 kDa peptide of left ventricular collagen type III and α-smooth muscle cell actin were increased suggesting some remodeling had occurred. Left ventricular protein levels of the T-cell marker CD2 was significantly increased at all time points, while the neutrophil marker myeloperoxidase was decreased at 2 weeks and 9 months. CONCLUSIONS: These results taken together suggest 16O ion exposure did not result in cardiac fibrosis or cardiac dysfunction in female mice. However, it does appear mild cardiac remodeling occurs in response to HZE radiation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oxígeno / Radiación Cósmica Límite: Animals Idioma: En Revista: Life Sci Space Res (Amst) Año: 2022 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oxígeno / Radiación Cósmica Límite: Animals Idioma: En Revista: Life Sci Space Res (Amst) Año: 2022 Tipo del documento: Article Pais de publicación: Países Bajos