Pre-stroke surgery is not beneficial to normotensive rats undergoing sixty minutes of transient focal cerebral ischemia

PLoS One. 2018 Dec 28;13(12):e0209370. doi: 10.1371/journal.pone.0209370. eCollection 2018.

Abstract

Experimental stroke in rodents, via middle cerebral artery occlusion (MCAO), can be associated with a negative impact on wellbeing and mortality. In hypertensive rodents, pre-stroke craniotomy increased survival and decreased body weight loss post-MCAO. Here we determined the effect, in normotensive Sprague-Dawley rats following 60 minutes MCAO, with or without pre-surgical craniotomy, on post-stroke outcomes in terms of weight loss, neurological deficit, lesion volume and functional outcomes. There was no effect of pre-stroke craniotomy on indicators of wellbeing including survival rate (P = 0.32), body weight loss (P = 0.42) and neurological deficit (P = 0.75). We also assessed common outcome measures following experimental stroke and found no effect of pre-stroke craniotomy on lesion volume as measured by T2-weighted MRI (P = 0.846), or functional performance up to 28 days post-MCAO (staircase test, P = 0.32; adhesive sticker test, P = 0.49; cylinder test, P = 0.38). Thus, pre-stroke craniotomy did not improve animal welfare in terms of body weight loss and neurological deficit. However, it is important, given that a number of drug delivery studies utilise the craniotomy procedure, to note that there was no effect on lesion volume or functional outcome following experimental stroke.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blood Pressure
  • Cerebrum / blood supply
  • Cerebrum / diagnostic imaging
  • Craniotomy*
  • Disease Models, Animal
  • Humans
  • Infarction, Middle Cerebral Artery / diagnostic imaging
  • Infarction, Middle Cerebral Artery / etiology
  • Infarction, Middle Cerebral Artery / mortality
  • Infarction, Middle Cerebral Artery / prevention & control*
  • Ischemic Attack, Transient / diagnostic imaging
  • Ischemic Attack, Transient / etiology
  • Ischemic Attack, Transient / mortality
  • Ischemic Attack, Transient / prevention & control*
  • Magnetic Resonance Imaging
  • Male
  • Rats
  • Rats, Sprague-Dawley
  • Survival Rate
  • Treatment Outcome
  • Weight Loss

Grants and funding

This work was supported by the National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3Rs; NC/M001768/1 to CG and MK).