| First Author | Ni R | Year | 2019 |
| Journal | Front Aging Neurosci | Volume | 11 |
| Pages | 27 | PubMed ID | 30890928 |
| Mgi Jnum | J:276312 | Mgi Id | MGI:6313931 |
| Doi | 10.3389/fnagi.2019.00027 | Citation | Ni R, et al. (2019) fMRI Reveals Mitigation of Cerebrovascular Dysfunction by Bradykinin Receptors 1 and 2 Inhibitor Noscapine in a Mouse Model of Cerebral Amyloidosis. Front Aging Neurosci 11:27 |
| abstractText | Functional magnetic resonance imaging (fMRI) techniques can be used to assess cerebrovascular dysfunction in Alzheimer's disease, an important and early contributor to pathology. We hypothesized that bradykinin receptor inhibition alleviates the vascular dysfunction in a transgenic arcAbeta mouse model of cerebral amyloidosis and that fMRI techniques can be used to monitor the treatment response. Transgenic arcAbeta mice, and non-transgenic littermates of 14 months-of-age were either treated with the bradykinin receptors 1 and 2 blocker noscapine or received normal drinking water as control over 3 months (n = 8-11/group) and all mice were assessed using fMRI at the end of the treatment period. Perfusion MRI using an arterial spin labeling technique showed regional hypoperfusion in arcAbeta compared to non-transgenic controls, which was alleviated by noscapine treatment. Similarly, measuring cerebral blood volume changes upon pharmacological stimulation using vessel dilator acetazolamide revealed recovery of regional impairment of cerebral vascular reactivity in arcAbeta mice upon noscapine treatment. In addition, we assessed with immunohistochemistry beta-amyloid (Abeta) and inflammation levels in brain sections. Immunohistological stainings for Abeta deposition (6E10) and related microgliosis (Iba1) in the cortex and hippocampus were found comparable between noscapine-treated and untreated arcAbeta mice. In addition, levels of soluble and insoluble Abeta38, Abeta40, Abeta42 were found to be similar in brain tissue homogenates of noscapine-treated and untreated arcAbeta mice using electro-chemiluminescent based immunoassay. In summary, bradykinin receptors blockade recovered cerebral vascular dysfunction in a mouse model of cerebral amyloidosis. fMRI methods revealed the functional deficit in disease condition and were useful tools to monitor the treatment response. |
