Marco ColizziUniversity of Udine | UNIUD · Department of Medicine (DMED)
Marco Colizzi
MD, PhD
Psychiatry and Neuroscience
About
128
Publications
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Introduction
Prof Marco Colizzi, MD, PhD, is Associate Professor and Chair of Psychiatry at the University of Udine, Italy. He is also Visiting Senior Lecturer at King’s College London where he received a PhD in Neuroscience for the study of the neurocognitive and neurochemical effects of cannabinoids on the human brain. Prof Colizzi’s research focuses on the neuropsychopharmacology and neurocognitive function of psychosis and neurodevelopmental conditions, with a focus on prevention and early intervention.
Additional affiliations
July 2019 - September 2021
May 2019 - April 2021
September 2018 - April 2019
Education
June 2015 - November 2018
May 2010 - May 2015
October 2003 - October 2009
Publications
Publications (128)
The occupational environment may affect one’s psychophysical health by leveraging both external workplace stressors and individual psychological responses. We developed a comprehensive questionnaire to assess occupational stress among postgraduate medical trainees, investigating both situational and personal aspects. Exploratory factor analysis was...
Despite promise of its supplementation as both monotherapy and add-on treatment in autism spectrum disorder (ASD), the biobehavioral effects of Palmitoylethanolamide (PEA) in autistic adults have never been explored so far. We discussed the cases of two autistic adults with different degrees of severity (level 1 and level 2) presenting with symptom...
There is no multi-country/multi-language study testing a-priori multivariable associations between non-modifiable/modifiable factors and validated wellbeing/multidimensional mental health outcomes before/during the COVID-19 pandemic. Moreover, studies during COVID-19 pandemic generally do not report on representative/weighted non-probability sample...
Aim
This study assessed whether transition age between adolescence and young adulthood poses a challenge for both patients and mental health services.
Methods
We retrospectively examined the baseline characteristics, diagnoses and treatments of 99 individuals aged 16–35 presenting to the PRecocity of Intervention in Adolescent Medicine (PRIMA) tra...
Introduction Clinical case reports enrich medical literature by presenting rare medical issues. However, case reports that do not adhere to a standard template often lack rigor and limit their usefulness in clinical guidance. Several guidelines for reporting case reports have been structured, while further improvements are still required. The curre...
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition characterized by impaired social communication and restricted or repetitive behavior and interests. Psychic distress is common among individuals with ASD, especially in its milder form (level 1), with anxiety and depression being the most common types. Recent research has iden...
Objective
Factitious disorder is characterized by a pattern of abnormal behavior in which patients deliberately produce, falsify, or exaggerate physical and/or psychological symptoms that have no, or little, organic basis, to assume the sick role. In the context of a factitious disorder, depression can be both a feigned disease and an associated co...
In August 2023, the Italian Health Ministry listed cannabidiol (CBD) as a drug of abuse. This rekindled the debate on the medical and non-medical use of cannabis. The most discussed topics are risks related to the use of cannabis, the decriminalization/legalization of recreational cannabis, and use of cannabis-based drugs for medical purposes. The...
Dandy–Walker complex (DWC) consists of a continuum of brain malformations involving the posterior fossa, often leading to psychiatric manifestations during adulthood. We discussed the case of a young woman with Dandy–Walker variant (DWV) and a comorbid complex neuropsychiatric presentation, who was diagnosed with an eating disorder, obsessive–compu...
While insomnia symptoms may be a risk factor for mental disturbances, few studies evaluated “Insomnia Disorder” and its relationship with perinatal psychopathology. Pregnant women were recruited during their last routine assessment before being hospitalized for delivery during the 3rd trimester at the Gynaecological Unit of the University Hospital...
Objectives
To assess the prevalence of neuropsychiatric symptoms 2 years after the COVID-19 acute phase and to identify biobehavioral risk factors.
Methods
This 2-year prospective study assessed adult individuals with COVID-19 via face-to-face interview and laboratory testing at onset, and via telephone interview at 2-year follow-up. Data collecte...
International studies measuring wellbeing/multidimensional mental health before/ during the COVID-19 pandemic, including representative samples for >2 years, identifying risk groups and coping strategies are lacking. COH-FIT is an online, international, anonymous survey measuring changes in well-being (WHO-5) and a composite psychopathology P-score...
Background
To date, no psychotropic medication has shown to effectively halt progression to psychosis among individuals at Clinical High-Risk for psychosis (CHR), fueling the search for novel therapeutic agents. Recent evidence supports Palmitoylethanolamide (PEA) signaling as a potential psychosis biomarker, also indicating a therapeutic role for...
Psychosocial stressors have been suggested to precipitate psychotic episodes in patients with pre‐existing psychosis and otherwise healthy subjects. However, such a risk has never been formally investigated in individuals with autism spectrum disorder (ASD). Sixty‐nine autistic adolescents hospitalized for psychotic/manic symptoms (PSY) and other m...
Background
Several scientific contributions have summarized the “lessons learnt” during the coronavirus disease 2019 (COVID-19) pandemic, but only a few authors have discussed what we have learnt on how to design and conduct research during a pandemic. The main intent of this study was to summarize the lessons learnt by an Italian multidisciplinary...
Introduction
Vaccination against SARS-CoV-2 has been used to reduce the severity of COVID-19 disease and the incidence of new cases. However, a significant proportion of people have shown vaccination hesitancy.
Methods
This study explored psychological factors related to vaccination hesitancy in a sample of Italian COVID-19 patients (N = 54), hosp...
Background
The diathesis-stress paradigm and the cannabinoid-hypothesis have been proposed as possible pathophysiological models of schizophrenia. However, they have historically been studied independently of each other.
Objective
This PRISMA 2020-compliant systematic review aimed at reappraising the interplay be- tween the hypothalamic-pituitary-...
Introduction
The endocannabinoid (eCB) system disruption has been suggested to underpin the development of psychosis, fueling the search for novel, better-tolerated antipsychotic agents that target the eCB system. Among these, palmitoylethanolamide (PEA), an N-acylethanolamine (AE) with neuroprotective, anti-inflammatory, and analgesic properties,...
COVID-19 survivors have been reported to be at risk of long-term neuropsychiatric sequalae; however, prospective evidence in this regard is lacking. We prospectively assessed the occurrence of mental-health-domain-related symptoms over a 24-month period following COVID-19 onset in a cohort of 230 patients. Of them, 36.1% were still presenting with...
The psychoactive properties of cannabis have been known forever. Since 1987, several prospective studies have suggested an increased risk of psychosis among cannabis users, with alternative explanations failing to account for such an effect. A cause-effect relationship has thus been implied. Further evidence has indicated that there is a dose-respo...
Background:
Despite accumulating evidence of an association between stressful life events and psychosis relapse, the extent to which this is a causal relationship remains unclear. We aimed to examine the association between exposure to, and number of, stressful life events after initial psychosis onset and psychosis relapse.
Methods:
In this 2-y...
Background:
Mentalization is the ability to use internal mental states to manage and understand one's own and others' behavior. Inefficient mentalization has been associated to poor neuropsychological outcomes, including substance use disorder (SUD) and addiction. However, studies primarily investigating mentalization in SUD are lacking.
Methods:...
This study assessed changes in revolving-door (RD) mental health hospitalizations during the COVID-19 pandemic. A 5-year retrospective hospital chart review was performed, collecting revolving-door hospitalization, sociodemographic, and clinical data. Out of 1036 patients, 5.69% had RD hospitalizations, which accounted for 10.38% of all recorded ho...
Neurodevelopmental disorders (NDDs) encompass a group of complex conditions with onset during the early developmental period. Such disorders are frequently associated with a number of neuropsychiatric features, the most prevalent ones being autism spectrum disorder, attention-deficit/hyperactivity disorder, intellectual disability, communication an...
COVID-19 pandemic may have affected youth's mental wellbeing. Youth admissions for mental health emergencies over the 2-year period following the COVID-19 outbreak (March 2020-February 2022) were compared to those occurring in the same period of 2018-2020, with reference to individual and clinical data. The study identified 30 admissions in the pre...
Accumulating evidence indicates that the COVID-19 pandemic carries risks to psychological health and represents a collective traumatic experience with consequences at the social, economic, and health levels. The primary aim of this study was to collect ongoing COVID-19 survivors’ pandemic-related experiences as expressed through the use of metaphor...
Absconding from inpatient psychiatric services has been associated with poor outcomes, putting the patient and community at risk and prolonging the recovery process. A retrospective study investigated the absconding rates and risk factors among patients admitted to an open-door, no-restraint inpatient psychiatric unit. Overall, the absconding rate...
Background:
The Collaborative Outcome study on Health and Functioning during Infection Times (COH-FIT; www.coh-fit.com) is an anonymous and global online survey measuring health and functioning during COVID-19 pandemic. The aim of this study was to test concurrently the validity of COH-FIT items and the internal validity of the co-primary outcome,...
Workplaces can be associated with occupational stress, detrimental consequences in terms of loss of health and reduced psychosocial well-being. Importantly, employees may be particularly at risk of poorer well-being during times of adversity at work, when not able to apply adaptive coping strategies and adopt a more empathetic approach. This study...
Cognitive decline is believed to be associated with neurodegenerative processes involving excitotoxicity, oxidative damage, inflammation, and microvascular and blood-brain barrier dysfunction. Interestingly, research evidence suggests upregulated synthesis of lipid signaling molecules as an endogenous attempt to contrast such neurodegeneration-rela...
Background
Factitious Disorder is a condition included among psychiatric disorders, where symptoms are intentionally produced to seek medical attention. Its epidemiology, treatment, and outcome are largely unknown.
Objective
To increase knowledge of the condition, we discuss a pediatric case where the patient feigned neuropsychiatric symptoms.
Me...
Being particularly vulnerable to the pro-psychotic effects of cannabinoid exposure, autism spectrum individuals present with an increased risk of psychosis, which may be passed on to their own children. More specifically, cannabis exposure among autism spectrum individuals seems to exert disruptive epigenetic effects that can be intergenerationally...
Introduction: Emerging evidence suggests that mental health symptoms in COVID-19 survivors are higher than expected, possibly indicating that such symptoms are more likely to develop post-infection than just persist as a residual component of the acute phase. It is thus imperative to investigate the potential development of a post-COVID mental heal...
Evidence indicates shared physiopathological mechanisms between autism and psychosis. In this regard, the endocannabinoid system has been suggested to modulate neural circuits during the early stage of neurodevelopment, with implications for both autism and psychosis. Nevertheless, such potential common markers of disease have been investigated in...
Developmental abnormalities of the central nervous system include disorders such as autism spectrum disorder, attention deficit hyperactivity disorder, Tourette syndrome and intellectual disability, with an estimated overall prevalence of 15% in industrialised countries. The term neurodevelopmental disorders refers to an array of overlapping and di...
Background: . High-quality comprehensive data on short-/long-term physical/mental health effects of the COVID-19 pandemic are needed.
Methods: . The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-FIT) is an international, multi-language (n=30) project involving >230 investigators from 49 countries/territories/re...
Many studies have investigated the impact of gender on mental health, but only a few have addressed gender differences in mental health risk and prevention. We conducted a narrative review to assess the current state of knowledge on gender-specific mental health preventive interventions, along with an analysis of gender-based risk factors and avail...
Background: The COVID-19 pandemic has altered daily routines and family functioning, led to closing schools, and dramatically limited social interactions worldwide. Measuring its impact on mental health of vulnerable children and adolescents is crucial. Methods: The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-...
COVID-19 pandemic may affect children's mental health. Children <18 years in-patiently admitted for mental health emergencies between March 2020 and June 2021 were compared to those admitted in the same period of 2018–2019 in terms of sociodemographic and clinical characteristics. There were 49 admissions in the pre-pandemic period and 60 in the pa...
Antiseizure medications are the cornerstone pharmacotherapy for epilepsy. They are not devoid of side effects. In search for better-tolerated antiseizure agents, cannabinoid compounds and other N-acylethanolamines not directly binding cannabinoid receptors have drawn significant attention. Among these, palmitoylethanolamide (PEA) has shown neuropro...
Mosaic trisomy 20 is a genetic condition in which three chromosomes 20 are found in some cells. Its clinical phenotype seems to be highly variable, with most features not reported across all individuals and not considered pathognomonic of the condition. Limited and recent evidence indicates that neuropsychiatric manifestations may be more present i...
Background: The COVID-19 pandemic has altered daily routines and family functioning, led to closing schools,
and dramatically limited social interactions worldwide. Measuring its impact on mental health of vulnerable
children and adolescents is crucial.
Methods: The Collaborative Outcomes study on Health and Functioning during Infection Times (C...
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Background
: The COVID-19 pandemic has altered daily routines and family functioning, led to closing schools, and dramatically limited social interactions worldwide. Measuring its impact on mental health of vulnerable children and adolescents is crucial.
Methods
: The Collaborative Outcome study on Health and Functioning during Infection...
Youth with Attention-Deficit Hyperactivity Disorder (ADHD) may suffer from comorbid difficulties, such as anxiety–depressive symptoms, social withdrawal, and somatic complaints. Although stimulants remain the ADHD cornerstone treatment, mental fatigue, school problems and low self-esteem may persist, often being the most unacceptable symptoms for t...
High doses of delta-9-tetrahydrocannabinol (THC), the main psychoactive component of cannabis, have been shown to have anxiogenic effects. Additionally, THC effects have been shown to be modulated by genotype, including the single nucleotide polymorphism (SNP) rs1130233 at the protein kinase AKT1 gene, a key component of the dopamine signalling cas...
Background: Long-term benzodiazepine (BDZ)/Z-drug use, which is a risk factor for dependence, is frequent in neuropsychiatric conditions, especially emotional disorders. Also, BDZ/Z-drug misuse is associated with increased emotion dysregulation symptoms. This study aimed to investigate neuropsychiatric distress in patients with BZD/Z-drug use disor...
Background: . High-quality comprehensive data on short-/long-term physical/mental health effects of the COVID�19 pandemic are needed.
Methods: . The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-FIT) is an
international, multi-language (n=30) project involving >230 investigators from 49 countries/territories/r...
High doses of delta-9-tetrahydrocannabinol (THC), the main psychoactive component of cannabis, have been shown to have anxiogenic effects. Also, THC effects have been shown to be modulated by genotype, including the single nucleotide polymorphism (SNP) rs1130233 at the protein kinase AKT1 gene, a key component of the dopamine signaling cascade. As...
Background
: High-quality comprehensive data on short-/long-term physical/mental health effects of the COVID-19 pandemic are needed.
Methods
: The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-FIT) is an international, multi-language (n=30) project involving >220 investigators from 49 countries, endorsed by nat...
Autism spectrum disorder (ASD) pathophysiology is not completely understood; however, altered inflammatory response and glutamate signaling have been reported, leading to the investigation of molecules targeting the immune-glutamatergic system in ASD treatment. Palmitoylethanolamide (PEA) is a naturally occurring saturated N-acylethanolamine that h...
Equine-assisted activities and therapies (EAAT) have been suggested to improve adaptive behavior, and possibly motor function, in autism spectrum disorder (ASD). This study investigated the effects of EAAT on adaptive behavior and motor function in 15 children with ASD (13 males) aged 7–15 years as well as the impact of EAAT on the magnitude of str...
Neurodevelopmental disorders (NDDs) have been suggested to lie on a gradient continuum, all resulting from common brain disturbances, but with different degrees of impairment severity. This case-control study aimed to assess postural stability against such hypothesis in 104 children/adolescents aged 5–17, of whom 81 had NDDs and 23 were healthy con...
Children and adolescents with Tourette syndrome may suffer from comorbid psychological and behavioral difficulties, primarily Attention-Deficit Hyperactivity Disorder-related manifestations including impulsive, aggressive, and disruptive behavior, and Obsessive-Compulsive Disorder-related disturbances. Often, such additional problems represent the...
The neurobiological mechanisms underlying the association between cannabis use and acute or long-lasting psychosis are not completely understood. While some evidence suggests altered striatal dopamine may underlie the association, direct evidence that cannabis use affects either acute or chronic striatal dopamine is inconclusive. In contrast, pre-c...
Possibly orally transmitted from before circa 2000 B [...]
Background and objectives:
Adolescence represents a critical period for rapid psychophysical and socio-cognitive changes, with implications for health and wellbeing in later life. From this perspective, the manifestation of unhealthy lifestyles and dysfunctional behaviors may reflect a change in wellbeing requiring alertness and prompt interventio...
Background:
Cannabis use has been associated with psychosis through exposure to delta-9-tetrahydrocannabinol (Δ9-THC), its key psychoactive ingredient. Although preclinical and human evidence suggests that Δ9-THC acutely modulates glial function and hypothalamic-pituitary-adrenal (HPA) axis activity, whether differential sensitivity to the acute p...
Motor abnormalities have been suggested to play a role in most neuropsychiatric disorders, as a potential generic neurodevelopmental vulnerability. However, they still represent a neglected area, with a paucity of empirical studies, especially in pediatric populations. This case-control study aimed to comprehensively assess motor functioning in chi...
Cannabis use during the critical neurodevelopmental period of adolescence, may lead to brain structural, functional, and histological alterations that may underpin some of the longer-term behavioral and psychological harms associated with it. The endocannabinoid system performs a key regulatory and homeostatic role, that undergoes developmental cha...
The 2019 coronavirus disease (COVID-19) outbreak could result in higher levels of psychological distress, especially among people suffering from pre-existing mental health conditions. Young individuals with autism spectrum disorders (ASD) are particularly at risk due to their vulnerability to unpredictable and complex changes. This study aimed to i...
Research evidence suggests a dose–response relationship for the association between cannabis use and risk of psychosis. Such relationship seems to reflect an increased risk of psychosis not only as a function of frequent cannabis use, but also of high-potency cannabis use in terms of concentration of Δ-9-tetrahydrocannabinol (Δ9-THC), its main psyc...
The associative striatum, an established substrate in psychosis, receives widespread glutamatergic projections. We sought to see if glutamatergic indices are altered between early psychosis patients with and without a history of cannabis use and characterise the relationship to grey matter. 92 participants were scanned: Early Psychosis with a histo...
Rationale
Stress is a risk factor for psychosis and treatments which mitigate its harmful effects are needed. Cannabidiol (CBD) has antipsychotic and anxiolytic effects.
Objectives
We investigated whether CBD would normalise the neuroendocrine and anxiety responses to stress in clinical high risk for psychosis (CHR) patients.
Methods
Thirty-two C...