Changes in cerebral blood flow during an alteration in glycemic state in a large non-human primate (Papio hamadryas sp.)

2Citations
Citations of this article
11Readers
Mendeley users who have this article in their library.

Abstract

Changes in cerebral blood flow (CBF) during a hyperglycemic challenge were mapped, using perfusion-weighted MRI, in a group of non-human primates. Seven female baboons were fasted for 16 h prior to 1-h imaging experiment, performed under general anesthesia, that consisted of a 20-min baseline, followed by a bolus infusion of glucose (500 mg/kg). CBF maps were collected every 7 s and blood glucose and insulin levels were sampled at regular intervals. Blood glucose levels rose from 51.3 ± 10.9 to 203.9 ± 38.9 mg/dL and declined to 133.4 ± 22.0 mg/dL, at the end of the experiment. Regional CBF changes consisted of four clusters: cerebral cortex, thalamus, hypothalamus, and mesencephalon. Increases in the hypothalamic blood flow occurred concurrently with the regulatory response to systemic glucose change, whereas CBF declined for other clusters. The return to baseline of hypothalamic blood flow was observed while CBF was still increasing in other brain regions. The spatial pattern of extra-hypothalamic CBF changes was correlated with the patterns of several cerebral networks including the default mode network. These findings suggest that hypothalamic blood flow response to systemic glucose levels can potentially be explained by regulatory activity. The response of extra-hypothalamic clusters followed a different time course and its spatial pattern resembled that of the default-mode network.

Cite

CITATION STYLE

APA

Kochunov, P., Wey, H. Y., Fox, P. T., Lancaster, J. L., Davis, M. D., Wang, D. J. J., … Voruganti, V. S. (2017). Changes in cerebral blood flow during an alteration in glycemic state in a large non-human primate (Papio hamadryas sp.). Frontiers in Neuroscience, 11(FEB). https://doi.org/10.3389/fnins.2017.00049

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free