Developing treatments for cognitive deficits in schizophrenia: the challenge of translation

JW Young, MA Geyer - Journal of psychopharmacology, 2015 - journals.sagepub.com
Journal of psychopharmacology, 2015journals.sagepub.com
Schizophrenia is a life-long debilitating mental disorder affecting tens of millions of people
worldwide. The serendipitous discovery of antipsychotics focused pharmaceutical research
on developing a better antipsychotic. Our understanding of the disorder has advanced
however, with the knowledge that cognitive enhancers are required for patients in order to
improve their everyday lives. While antipsychotics treat psychosis, they do not enhance
cognition and hence are not antischizophrenics. Developing pro-cognitive therapeutics has …
Schizophrenia is a life-long debilitating mental disorder affecting tens of millions of people worldwide. The serendipitous discovery of antipsychotics focused pharmaceutical research on developing a better antipsychotic. Our understanding of the disorder has advanced however, with the knowledge that cognitive enhancers are required for patients in order to improve their everyday lives. While antipsychotics treat psychosis, they do not enhance cognition and hence are not antischizophrenics. Developing pro-cognitive therapeutics has been extremely difficult, however, especially when no approved treatment exists. In lieu of stumbling on an efficacious treatment, developing targeted compounds can be facilitated by understanding the neural mechanisms underlying altered cognitive functioning in patients. Equally importantly, these cognitive domains will need to be measured similarly in animals and humans so that novel targets can be tested prior to conducting expensive clinical trials. To date, the limited similarity of testing across species has resulted in a translational bottleneck. In this review, we emphasize that schizophrenia is a disorder characterized by abnormal cognitive behavior. Quantifying these abnormalities using tasks having cross-species validity would enable the quantification of comparable processes in rodents. This approach would increase the likelihood that the neural substrates underlying relevant behaviors will be conserved across species. Hence, we detail cross-species tasks which can be used to test the effects of manipulations relevant to schizophrenia and putative therapeutics. Such tasks offer the hope of providing a bridge between non-clinical and clinical testing that will eventually lead to treatments developed specifically for patients with deficient cognition.
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