Efficacy of progesterone following a moderate unilateral cortical contusion injury.

Abstract:

:Traumatic brain injury (TBI) results in an accumulation of edema and loss of brain tissue. Progesterone (PROG) has been reported to reduce edema and cortical tissue loss in a bilateral prefrontal cortex injury. This study tests the hypothesis that PROG is neuroprotective following a unilateral parietal cortical contusion injury (CCI). Adult male Sprague-Dawley rats were subjected to a moderate unilateral TBI using the CCI model. Rats were given 8 mg/kg PROG 15 min post-injury with four subsequent injections (6 h, and days 1, 2, and 3). Edema was determined 3 days post-injury, while cortical tissue sparing was also evaluated at 7 days post-injury. Animals were injured and given one of four treatments: (I) vehicle; (II) low dose: 8 mg/kg PROG; (III) high dose: 16 mg/kg PROG; (IV) tapered: 8 mg/kg PROG. Animals were given an initial injection within 15 min, followed by five injections (6 h, and days 1, 2, 3, and 4). Group IV received two additional injections (4 mg/kg on day 5; 2 mg/kg on day 6). PROG failed to alter both cortical edema and tissue sparing at any dose. Failure to modify two major sequelae associated with TBI brings into question the clinical usefulness of PROG as an effective treatment for all types of brain injury.

journal_name

J Neurotrauma

journal_title

Journal of neurotrauma

authors

Gilmer LK,Roberts KN,Scheff SW

doi

10.1089/neu.2007.0477

subject

Has Abstract

pub_date

2008-06-01 00:00:00

pages

593-602

issue

6

eissn

0897-7151

issn

1557-9042

journal_volume

25

pub_type

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