Skip to content

Smoking and schizophrenia linked by alterations in brain nicotine signals.

Schizophrenia is associated with increased rates and intensity of tobacco smoking.  A growing body of research suggests that the relationship between schizophrenia and smoking stems, in part, from an effort by patients to use nicotine to self-medicate symptoms and cognitive impairment associated with the disease.

A new study from Yale University sheds light on this hypothesis. The team found that the level of nicotine receptors in the brain was lower in schizophrenia patients than in a matched healthy group. Further, smoking, which is known to increase the levels of receptors for nicotine in the brain, had this effect in both groups, although was blunted in schizophrenia.

However, in the schizophrenia group, the smoking-related increase in the level of nicotine receptors was associated with lower levels of social withdrawal, blunted emotional and motivational responses, as well as better cognitive function.

Nicotine mimics the actions of a natural chemical messenger, acetylcholine, which stimulates the receptors for nicotine in the brain. So, to conduct this work the researchers used single photon emission computed tomography to quantify the availability of nicotinic acetylcholine receptors (β2*-nAChRs) in smoking and non-smoking individuals with schizophrenia and healthy subjects.

The team found a blunted effect of tobacco smoking on the β2*-nAChR system in individuals with schizophrenia. Furthermore, they found that lower receptor availability of β2*-nAChRs in smokers with schizophrenia is associated with worse negative symptoms and worse performance on tests of executive function.  These findings may be relevant to the high rates of smoking in schizophrenia.

The data seem to suggest that smoking might produce some clinical benefits for some patients by increasing the availability of receptor targets for nicotine in the brain.  This finding adds to evidence that brain nicotine-related signalling might play a role for new medications developed to treat schizophrenia.

These findings suggest that β2*-nAChRs may be a target for developing treatments for negative symptoms and cognitive deficits associated with schizophrenia, for which no effective treatments exist.

Source:  Reed Elsevier Group PLC

Pictorial representation of the brain's dorsolateral prefrontal cortex. which can  only function correctly with properly functioning acetylcholine receptors.  Credit:  David Grubin Productions Inc.
Pictorial representation of the brain’s dorsolateral prefrontal cortex. which can only function correctly with properly functioning acetylcholine receptors. Credit: David Grubin Productions Inc.

Healthinnovations View All

Michelle Petersen is the founder of Healthinnovations, having worked in the health and science industry for over 21 years, which includes tenure within the NHS and Oxford University. Healthinnovations is a publication that has reported on, influenced, and researched current and future innovations in health for the past decade.

Michelle has been picked up as an expert writer for Informa publisher’s Clinical Trials community, as well as being listed as a blog source by the world’s leading medical journals, including the acclaimed Nature-Springer journal series.

Healthinnovations is currently indexed by the trusted Altmetric and PlumX metrics systems, respectively, as a blog source for published research globally. Healthinnovations is also featured in the world-renowned BioPortfolio, BioPortfolio.com, the life science, pharmaceutical and healthcare portal.

Most recently the Texas A&M University covered The Top 10 Healthinnovations series on their site with distinguished Professor Stephen Maren calling the inclusion of himself and his team on the list a reflection of “the hard work and dedication of my students and trainees”.

Michelle Petersen’s copy was used in the highly successful marketing campaign for the mega-hit film ‘Jumanji: The Next Level, starring Jack Black, Karen Gilian, Kevin Hart and Dwayne ‘The Rock’ Johnson. Michelle Petersen’s copywriting was part of the film’s coverage by the Republic TV network. Republic TV is the most-watched English language TV channel in India since its inception in 2017.

An avid campaigner in the fight against child sex abuse and trafficking, Michelle is a passionate humanist striving for a better quality of life for all humans by helping to provide traction for new technologies and techniques within healthcare.

One thought on “Smoking and schizophrenia linked by alterations in brain nicotine signals. Leave a comment

Leave a Reply

Translate »