PMID: 9550190Apr 29, 1998Paper

The problem of assessing effective neuroprotection in experimental cerebral ischemia

Progress in Neurobiology
D Corbett, S Nurse

Abstract

In animal models of global and focal ischemia neuroprotection is typically determined by quantifying the degree of cell loss or reduction in infarct volume shortly after the ischemic insult. These methods are unable to reliably detect more subtle forms of neuronal death and dysfunction that arise from injury to non-homogeneous cell populations (e.g. hilar and striatal neurons), or to dendrites (e.g. loss of structural proteins or decreased synaptic transmission). It is argued that this type of covert injury contributes to a wide range of functional impairments (e.g. decreased working memory, altered field potentials, loss of forelimb dexterity) that are rarely used as outcome measures in experimental studies even though they are of paramount importance clinically. The limitations of a purely histological approach in assessing neuroprotection are clearly illustrated using examples of protective drug therapies, mild hypothermia and ischemic preconditioning. An alternative strategy that incorporates behavioural, electrophysiological and histological endpoints is put forth as a more powerful method for gauging neuroprotection. The strength of this approach will be increased if these assessments are performed on the same animals. By...Continue Reading

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