Neuroprotective dobutamine treatment upregulates superoxide dismutase 3, anti-oxidant and survival genes and attenuates genes mediating inflammation

• Published in: BMC neuroscience Vol. 19; no. 1; pp. 9 - 17
• Main Authors: Markus, Tina, Ley, David, Hansson, Stefan R., Wieloch, Tadeusz, Ruscher, Karsten
• Format: Journal Article
• Language: English
• Published: London BioMed Central 09.03.2018; BioMed Central Ltd; BMC
• Subjects: Analysis; Animal Models; Biomedical and Life Sciences; Biomedicine; Clinical Medicine; Complications and side effects; Development and progression; Dobutamine; Dosage and administration; Gene array; Gene expression; Hippocampal slice cultures; Hypoxia; Inflammation; Klinisk medicin; Lipopolysaccharide; Medical and Health Sciences; Medicin och hälsovetenskap; Nervous system diseases; Neurobiology; Neurobiology of disease; Neurologi; Neurology; Neurosciences; Physiological aspects; Preconditioning; Prevention; Research Article; Sweden; Hippocampal slice cultures; Gene array; Superoxide dismutase 3; Dobutamine; Lipopolysaccharide; Hypoxia; Preconditioning
• ISSN: 1471-2202; 1471-2202
• DOI: 10.1186/s12868-018-0415-2

Background Labor subjects the fetus to an hypoxic episode and concomitant adrenomodullary catecholamine surge that may provide protection against the hypoxic insult. The beta1-adrenergic agonist dobutamine protects against hypoxia/aglycemia induced neuronal damage. We aimed to identify the associated protective biological processes involved. Results Hippocampal slices from 6 days old mice showed significant changes of gene expression comparing slices with or without dobutamine (50 mM) in the following two experimental paradigms: (1) control conditions versus lipopolysacharide (LPS) stimulation and (2) oxygen–glucose deprivation (OGD), versus combined LPS/OGD. Dobutamine depressed the inflammatory response by modifying the toll-like receptor-4 signalling pathways, including interferon regulatory factors and nuclear factor κ B activation in experimental paradigm 1. The anti-oxidant defense genes superoxide dismutase 3 showed an upregulation in the OGD paradigm while thioredoxin reductase was upregulated in LPS paradigm. The survival genes Bag-3, Tinf2, and TMBIM-1, were up-regulated in paradigm 1. Moreover, increased levels of SOD3 were verified on the protein level 24 h after OGD and control stimulation in cultures with or without preconditioning with LPS and dobutamine, respectively. Conclusions Neuroprotective treatment with dobutamine depresses expression of inflammatory mediators and promotes the defense against oxidative stress and depresses apoptotic genes in a model of neonatal brain hypoxia/ischemia interpreted as pharmacological preconditioning. We conclude that beta1-adrenoceptor activation might be an efficient strategy for identifying novel pharmacological targets for protection of the neonatal brain.