11C-(R)-PK11195 PET imaging of microglial activation and response to minocycline in zymosan-treated rats.

ABSTRACT:

Unlabelled

We sought to advance methodology for studying microglial activation and putative therapeutic downregulation in response to minocycline by means of noninvasive in vivo imaging. A reproducible focal white matter lesion was used to reliably compare treatment conditions.

Methods

The corpus callosum of female Sprague Dawley rats was injected with zymosan to promote microglial activation as confirmed by hematoxylin and eosin staining, (3)H-PK11195 autoradiography, and CD11b immunohistochemistry. A subset of subjects was treated systemically with minocycline to potentially alter microglial activation. Seven days after zymosan injection, subjects were imaged with PET using the radiotracer (11)C-(R)-PK11195. In vivo binding was evaluated using the distribution volume ratio

SUBMITTER: Converse AK 

PROVIDER: S-EPMC3761794 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature