http://www.nature.com/jcbfm/journal/v35/n12/full/jcbfm2015174a.html
Krisztián Szigeti1, Ildikó Horváth1, Dániel S Veres1, Bernadett Martinecz2, Nikolett Lénárt2, Noémi Kovács3, Erika Bakcsa1, Alexa Márta1, Mariann Semjéni3, Domokos Máthé3 and Ádám Dénes2
- 1Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
- 2Laboratory of Neuroimmunology, Institute of Experimental Medicine, Budapest, Hungary
- 3CROmed Translational Research Centers, Budapest, Hungary
Correspondence:
Dr A Denes, Laboratory of Neuroimmunology, Institute of Experimental
Medicine, Szigony u. 43, IX. Tuzoltó u. 37-47, Budapest 1083, Hungary.
E-mail: denesa@koki.hu
Received 23 April 2015; Revised 8 June 2015; Accepted 17 June 2015
Advance online publication 29 July 2015
Advance online publication 29 July 2015
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Abstract
Inflammation
that develops in the brain and peripheral organs after stroke
contributes profoundly to poor outcome of patients. However, mechanisms
through which inflammation impacts on brain injury and overall outcome
are improperly understood, in part because the earliest inflammatory
events after brain injury are not revealed by current imaging tools.
Here, we show that single-photon emission computed tomography (NanoSPECT/CT
Plus) allows visualization of blood brain barrier (BBB) injury after
experimental stroke well before changes can be detected with magnetic
resonance imaging (MRI). Early 99mTc-DTPA (diethylene triamine
pentaacetic acid) signal changes predict infarct development and
systemic inflammation preceding experimental stroke leads to very early
perfusion deficits and increased BBB injury within 2 hours
after the onset of ischemia. Acute brain injury also leads to
peripheral inflammation and immunosuppression, which contribute to poor
outcome of stroke patients. The SPECT imaging revealed early (within 2 hours)
changes in perfusion, barrier function and inflammation in the lungs
and the gut after experimental stroke, with good predictive value for
the development of histopathologic changes at later time points.
Collectively, visualization of early inflammatory changes after stroke
could open new translational research avenues to elucidate the
interactions between central and peripheral inflammation and to evaluate
in vivo ‘multi-system’ effects of putative anti-inflammatory treatments.
Complete article available at the link.
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