Abstract
Cognitive impairments in schizophrenia are common and severe. These impairments are also related to functional disability in schizophrenia. As a result, efforts are underway to enhance cognition in schizophrenia through a variety of pharmacological mechanisms. As part of this effort, a designated research design has been developed for this process, through an extensive consensus and validation effort. This paper reviews the methods for pharmacological cognitive enhancement, as well as previous results of efforts in the pharmacological domains. These domains include cholinergic, noradrenergic, serotonergic, glutamatergic, and GABA-ergic mechanisms. While previous results have not been particularly encouraging, there are many challenges that need to be overcome and many of the reasons for past failures may be due to resolvable issues. It is likely that this will be an area of research that will be developing extensively over the next decade and expanding to other conditions as well.
Similar content being viewed by others
References
Akbarian, S., Kim, J. J., Potkin, S. G., Hetrick, W. P., Bunney, W. E., Jr., & Jones, E. G. (1996). Maldistribution of interstitial neurons in the prefrontal white matter of brains of schizophrenic patients. Archives of General Psychiatry, 53, 425–436.
Anand, A., Charney, D. S., Oren, D. A., Berman, R. M., Hu, X. S., Cappiello, A., et al. (2000). Attenuation of the neuropsychiatric effects of ketamine with lamotrigine. Archives of General Psychiatry, 57, 270–276.
Angrist, B., Rotrosen, J., & Gershon, S. (1980). Differential effects of amphetamine and neuroleptics on negative vs. positive symptoms in schizophrenia. Psychopharmacology (Berl), 72(1), 17–9.
Apud, J. A., Mattay, V., Chen, J., Kolachana, B. S., Callicott, J. H., Rasetti, R., et al. (2007). Tolcapone improves cognition and cortical information processing in normal human subjects. Neuropsychopharmacology, 32, 1011–20.
Arnsten, A. F. (2004). Adrenergic targets for the treatment of cognitive deficits in schizophrenia. Psychopharmacology, 174, 25–31.
Arnsten, A. F., Cai, J. X., Murphy, B. L., & Goldman-Rakic, P. S. (1994). Dopamine D1 receptor mechanisms in the cognitive performance of young adult and aged monkeys. Psychopharmacology, 116, 143–151.
Arnsten, A. F. T., Cai, J. X., & Goldman-Rakic, P. S. (1988). The alpha-2adrenergic agonist guanfacine improves memory in aged monkeys without sedative or hypotensive side effects: Evidence for alpha-2 receptor subtypes. Journal of Neuroscience, 8, 4287–4297.
Barch, D. M., & Carter, C. S. (2005). Amphetamine improves cognitive function in medicated individuals with schizophrenia and in healthy volunteers. Schizophrenia Research, 77, 43–58.
Bell, M. D., Zito, W., Greig, T., & Wexler, B. E. (2008). Neurocognitive enhancement therapy with vocational services: work outcomes at two-year follow-up. Schizophrenia Research, 105, 18–29.
Buchanan, R. W., Davis, M., Goff, D., Green, M. F., Keefe, R. S. E., Leon, A. C., et al. (2005). A summary of the FDA-NIMHMATRICS workshop on clinical trial design for neurocognitive drugs for schizophrenia. Schizophrenia Bulletin, 31, 5–19.
Buchanan, R. W., Conley, R. R., Dickinson, D., Ball, M. P., Feldman, S., Gold, J. M., et al. (2007). Galantamine for the Treatment of Cognitive Impairments in People With Schizophrenia. American Journal of Psychiatry, 165, 82–89.
Buchanan, R. W., Javitt, D. C., Marder, S. R., Schooler, N. R., Gold, J. M., McMahon, R. P., et al. (2007). The Cognitive and Negative Symptoms in Schizophrenia Trial (CONSIST): The Efficacy of Glutamatergic Agents for Negative Symptoms and Cognitive Impairments. American Journal of Psychiatry, 164, 1593–1602.
Cahn, W., Rais, M., Stigter, F. P., van Haren, N. E., Caspers, E., Hulshoff Pol, H. E., et al. (2009). Psychosis and brain volume changes during the first 5 years of schizophrenia. European Neuropsychopharmacology, 19, 147–151.
DeLisi, L. E., Szulc, K. U., Bertisch, H. C., Majcher, M., & Brown, K. (2006). Understanding structural brain changes in schizophrenia. Dialogues in Clinical Neuroscience, 8, 71–78.
Egan, M. F., Goldberg, T. E., Kolachana, B. S., Callicott, J. H., Mazzanti, C. M., Straub, R. E., et al. (2001). Effect of COMT Val108/158 Met genotype on frontal lobe function and risk for schizophrenia. Proceedings of the National Academy of Sciences, 98, 6917–22.
Emre, M., Aarsland, D., Albanese, A., et al. (2004). Rivastigmine for dementia associated with Parkinson's disease. New England Journal of Medicine, 351, 2509–2518.
Freedman, R., Olincy, A., Buchanan, R. W., Harris, J. G., Gold, J. M., Johnson, L., et al. (2008). Initial Phase 2 Trial of a Nicotinic Agonist in Schizophrenia. American Journal of Psychiatry, 165, 1040–1047.
Friedman, J. I. (2004). Cholinergic targets for cognitive enhancement in schizophrenia: Focus on cholinesterase inhibitors and muscarinic agonists. Psychopharmacology (Berl), 174, 45–53.
Friedman, J. I., Adler, D. N., Howanitz, E., Harvey, P. D., Brenner, G., Temporini, H., et al. (2002). A double blind placebo controlled trial of donepezil adjunctive treatment to risperidone for the cognitive impairment of schizophrenia. Biological Psychiatry, 51, 349–357.
Friedman, J. I., Adler, D. N., Temporini, H. D., Kemether, E., Harvey, P. D., White, L., et al. (2001). Guanfacine treatment of cognitive impairment in schizophrenia. Neuropsychopharmacolog, 25, 402–409.
Friedman, J. I., Carpenter, D., Lu, J., Fan, J., Tang, C. Y., White, L., et al. (2008). A Pilot Study of Adjunctive Atomoxetine Treatment to Second-Generation Antipsychotics for Cognitive Impairment in Schizophrenia. Journal of Clinical Psychopharmacology, 28, 59–63.
Geyer, M. A., & Tamminga, C. A. (2004). Measurement and treatment research to improve cognition in schizophrenia: Neuropharmacological aspects. Psychopharmacology, 174, 1–2.
Giakoumaki, S. G., Roussos, P., & Bitsios, P. (2008). Improvement of prepulse inhibition and executive function by the COMT inhibitor tolcapone depends on COMT Val158Met polymorphism. Neuropsychopharmacology, 33, 3058–3068.
Goff, D. C., Keefe, R. S. E., Citrome, L., Davy, D., Krystal, J. H., Large, C., et al. (2007). Lamotrigine as Add-On Therapy in Schizophrenia Results of 2 Placebo-Controlled Trials. Journal of Clinical Psychopharmacology, 27, 582–589.
Goff, D. C. Lamberti, JS, L. A. C., Green, M. F., Miller, A. L., Patel, J., et al. (2008). A Placebo-Controlled Add-On Trial of the Ampakine, CX516, for Cognitive Deficits in Schizophrenia. Neuropsychopharmacology, 33, 465–472.
Green, M. F., Nuechterlein, K. H., Kern, R. S., Baade, L. E., Fenton, W. S., Gold, J. M., et al. (2008). Functional co-primary measures for clinical trials in schizophrenia: Results from the MATRICS psychometric and standardization study. American Journal of Psychiatry, 165, 221–228.
Harvey, P. D., & Cornblatt, B. A. (2008). Pharmacological cognitive enhancement in schizophrenia: An idea whose method has come. American Journal of Psychiatry, 165, 163–165.
Harvey, P. D., & Keefe, R. S. E. (2001). Interpreting studies of cognitive change in schizophrenia with novel antipsychotic treatment. American Journal of Psychiatry, 158, 176–184.
Heinrichs, R. W. (2005). The primacy of cognition in schizophrenia. American Psychologist, 60, 229–242.
Hunt, R. D., Arnsten, A. F. T., & Asbell, M. D. (1995). An open trial of guanfacine in the treatment of attention deficit hyperactivity disorder. Journal of the American Academy of Child and Adolescent Psychiatry, 34, 50–54.
Kahn, A. (2008). Current evidence for aripiprazole as augmentation therapy in major depressive disorder. Expert Reviews of Neurotherapy, 8, 1435–47.
Keefe, R. S. E., Malhotra, A. K., Meltzer, H. Y., Kane, J. M., Buchanan, R. W., Murth, A., et al. (2008). Efficacy and Safety of Donepezil in Patients with Schizophrenia or Schizoaffective Disorder: Significant Placebo/Practice Effects in a 12-Week, Randomized, Double-Blind, Placebo-Controlled Trial. Neuropsychopharmacology, 33, 1217–28.
Kern, R. S., Nuechterlein, K. H., Green, M. F., Baade, L. E., Fenton, W. S., et al. (2008). The MATRICS Consensus Cognitive Battery: Part 2. co-norming and standardization. American Journal of Psychiatry, 165, 214–220.
Kumari, V., Aasen, I., Ffytche, D., Williams, S. C., & Sharma, T. (2006). Neural correlates of adjunctive rivastigmine treatment to antipsychotics in schizophrenia: A randomized, placebo-controlled, double-blind fMRI study. Neuroimage, 29, 545–56.
Laruelle, M., Abi-Dargham, A., Gil, R., Kegeles, L., & Innis, R. (1999). Increased dopamine transmission in schizophrenia: relationship to illness phases. Biological Psychiatry, 46, 56–72.
Lewis, D. A., Cho, R. Y., Carter, C. S., Eklund, K., Forster, S., Kelly, M. A., et al. (2008). Subunit-selective modulation of GABA type A receptor neurotransmission and cognition in schizophrenia. American Journal of Psychiatry, 165, 1585–1593.
Lewis, D. A., Volk, D. W., & Hashimoto, T. (2004). Selective alterations in prefrontal cortical GABA neurotransmission in schizophrenia: a novel target for the treatment of working memory dysfunction. Psychopharmacology, 174, 143–150.
Levy, D. L., Smith, M., Robinson, D., Jody, D., Lerner, G., Alvir, J., et al. (1993). Methylphenidate increases thought disorder in recent onset schizophrenics, but not in normal controls. Biological Psychiatry, 34, 507–514.
Lim, K. O., Hedehus, M., Moseley, M., deCrespigny, A., Sullivan, E. V., & Pfefferbaum, A. (1999). Compromised white matter tract integrity in schizophrenia inferred from diffusion tensor imaging. Archives of General Psychiatry, 56, 367–374.
Lindenmayer, J. P., McGurk, S. R., Mueser, K. T., Khan, A., Wance, D., Hoffman, L., et al. (2008). A randomized controlled trial of cognitive remediation among inpatients with persistent mental illness. Psychiatric Services, 59, 241–247.
Marder, S. R., & Fenton, W. (2004). Measurement and Treatment Research to Improve Cognition in Schizophrenia: NIMH MATRICS initiative to support the development of agents for improving cognition in schizophrenia. Schizophrenia Research, 72, 5–9.
Menzies, L., Ooi, C., Kamath, S., Suckling, J., McKenna, P., Fletcher, P., et al. (2007). Effects of gamma-aminobutyric acidmodulating drugs on working memory and brain function in patients with schizophrenia. Archives of General Psychiatry, 64, 156–167.
McClure, M. M., Barch, D. M., Romero, M. J., Minzenberg, M. J., Triebwasser, J., Harvey, P. D., et al. (2007). The Effects of Guanfacine on Context Processing Abnormalities in Schizotypal Personality Disorder. Biological Psychiatry, 61, 1157–1160.
Minzenberg, M. J., & Carter, C. S. (2008). Modafinil: a review of neurochemical actions and effects on cognition. Neuropsychopharmacology, 33, 1477–1502.
Moghaddam, B. (2004). Targeting metabotropic glutamate receptors for treatment of the cognitive symptoms of schizophrenia. Psychopharmacology, 174, 39–44.
McGurk, S. R., Mueser, K. T., & Pascaris, A. (2005). Cognitive training and supported employment for persons with severe mental illness: one-year results from a randomized controlled trial. Schizophrenia Bulletin, 31, 898–909.
McGurk, S. R., Mueser, K. T., Feldman, K., Wolfe, R., & Pascaris, A. (2007). Cognitive Training for Supported Employment: 2–3 Year Outcomes of a Randomized Controlled Trial. American Journal of Psychiatry, 164, 437–441.
Morein-Zamir, S., Turner, D. C., & Sahakian, B. J. (2007). A review of the effects of modafinil on cognition in schizophrenia. Schizophrenia Bulletin, 33, 1298–1306.
Nuechterlein, K. H., Green, M. F., Kern, R. S., Baade, L. E., Barch, D., Cohen, J., et al. (2008). The MATRICS Consensus Cognitive Battery: Part 1. Test selection, reliability, and validity. American Journal of Psychiatry, 165, 203–213.
Patterson, T. L., Mausbach, B. T., McKibbin, C., et al. (2006). Functional adaptation skills training (FAST): a randomized trial of psychosocial intervention for middle-aged and older patients with chronic psychotic disorders. Schizophrenia Research, 86, 291–299.
Rogers, S. L., Doody, R. S., Mohs, R. C., & Friedhoff, L. T. (1998). Donepezil improves cognition and global function in Alzheimer disease: a 15-week, double-blind, placebo-controlled study. Donepezil Study Group. Archives of Internal Medicine, 158, 1021–1031.
Sharma, T. S., Reed, C., Aasen, I., & Kumari, V. (2006). Cognitive effects of adjunctive 24- week rivastigmine treatment to antipsychotics in schizophrenia: a randomized, placebo-controlled, double-blind investigation. Schizophrenia Research, 85, 73–83.
Sumiyoshi, T., Matsui, M., Nohara, S., Yamashita, I., Kurachi, M., Sumiyoshi, C., et al. (2001). Enhancement of Cognitive Performance in Schizophrenia by Addition of Tandospirone to Neuroleptic Treatment. American Journal of Psychiatry, 158, 1722–1725.
Sumiyoshi, T., Park, S., Jayathilake, K., Roy, A., Ertugrul, A., & Meltzer, H. Y. (2007). Effect of buspirone, a serotonin1A partial agonist, on cognitive function in schizophrenia: A randomized, double-blind, placebo-controlled study. Schizophrenia Research, 95, 158–168.
Vitiello, B., Martin, A., Hill, J., Mack, C., Molchan, S. E., Martinez, R., et al. (1997). Cognitive and behavioral effects of cholinergic, dopaminergic, and serotonergic blockade in humans. Neuropharmacology, 16, 15–24.
Wexler, B. E., & Bell, M. D. (2005). Cognitive remediation and vocational rehabilitation for schizophrenia. Schizophrenia Bulletin, 31, 931–941.
Woodward, N. D., Purdon, S. E., Meltzer, H. Y., et al. (2005). A meta-analysis of cognitive change to clozapine, olanzapine, quetiapine, and risperidone in schizophrenia. International Journal of Neuropsychopharmacology, 8, 457–472.
Zoccali, R., Muscatello, M. R., Bruno, A., Cambria, R., Micò, U., Spina, E., et al. (2007). The effect of lamotrigine augmentation of clozapine in a sample of treatment-resistant schizophrenic patients: a double-blind, placebo-controlled study. Schizophrenia Research, 93, 109–116.
Author information
Authors and Affiliations
Corresponding author
Additional information
This preparation of this paper was not supported by any commercial interest.
In the past year, Dr. Harvey has served as a consultant to Eli Lilly and Company, Johnson and Johnson Pharmaceutical Research and Development, Dainippon Sumitomo America, Merck and Company, and Shire Pharmaceuticals. He has grant support from Astra-Zeneca Pharmaceuticals and received travel reimbursement from Pfizer, Inc.
Rights and permissions
About this article
Cite this article
Harvey, P.D. Pharmacological Cognitive Enhancement in Schizophrenia. Neuropsychol Rev 19, 324–335 (2009). https://doi.org/10.1007/s11065-009-9103-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11065-009-9103-4