The role of seasonality and photoperiod on the lethality of suicide attempts: A case-control study

Aguglia, Andrea; Serafini, Gianluca; Solano, Paola; Giacomini, Gabriele; Conigliaro, Claudia; Salvi, Virginio; Claudio, Mencacci; Romano, Miroslav; Aguglia, Eugenio; Amore, Mario

doi:10.1016/j.jad.2018.12.094

Cited by 29 publications

(23 citation statements)

References 87 publications

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“…Patients with Alzheimer's (AD) and Parkinson's disease exhibit sundowning phenomenon where they experience psychological and behavioral disturbances such as depressed mood, elevated anxiety, and heightened agitation during sunset (Bedrosian & Nelson, ). About 20% of the bipolar disorder (BD) patients demonstrate abnormal chronobiological rhythmicity and seasonal effect (Aguglia et al, ), especially with luminosity (Aguglia et al, ; Goikolea et al, ). Excessive sunlight exposure during spring/summer is reported to result in higher prevalence of hospitalization possibly due to impaired biological mechanisms such as dysregulation of serotonin/melatonin metabolism (Abreu & Bragança, ; Aguglia, Borsotti, & Maina, ; Geoffroy et al, ).…”

Section: Introductionmentioning

confidence: 99%

Short photoperiod restores ventral subicular lesion‐induced deficits in affective and socio‐cognitive behavior in male Wistar rats

Subhadeep

Srikumar

Rao

et al. 2020

J of Neuroscience Research

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Photoperiod (day-length) has enduring effects on an organism's physiological functions like metabolism and behavioral phenotypes including cognition and affect.Circadian rhythm manipulations are potentially effective non-pharmacological strategies in the management of central nervous system insults. In our previous study, we demonstrated the efficacy of short photoperiod regime (SPR; 06/18 hr light-dark cycle) in establishing functional recovery in ventral subicular lesion (VSL) rats. The present study further demonstrates the efficacy of SPR in mitigating anxiety and depression as well as facilitating socio-cognitive behavior in VSL rats. VSL elevated the basal plasma corticosterone levels, increased anxiety, anhedonia, and behavioral despair with decreased self-care. The VSL rats also exhibited a considerable degree of impaired social cognition, in terms of altered social preference and social novelty.Exposure to SPR for 21 days mitigated the anxiety-and depressive-like phenotypes as well as improved social cognition significantly. Thus, the study demonstrated the effectiveness of SPR strategy in reversing most of the behavioral deficits caused by VSL. SPR, perhaps, would have regulated the hypothalamo-pituitary-adrenal axis responsiveness as we observed a decrease in plasma corticosterone levels following SPR in VSL rats. The study implies the need for developing a task-dependent SPR strategy to achieve complete behavioral recovery as the functional demands of each behavior is distinct. In summary, the study highlights the efficacy of photoperiod manipulation as a novel, non-pharmacological approach in mitigating the affective and cognitive deficits associated with neuropsychiatric disorders such as bipolar disorder and Alzheimer's disease wherein circadian rhythm alterations are implicated. K E Y W O R D S anxiety, behavioral recovery, corticosterone, short photoperiod, socio-cognitive behavior, ventral subicular lesion | 1115 SUBHADEEP Et Al. | 1133 SUBHADEEP Et Al.

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Section: Introductionmentioning

confidence: 99%

Short photoperiod restores ventral subicular lesion‐induced deficits in affective and socio‐cognitive behavior in male Wistar rats

Subhadeep

Srikumar

Rao

et al. 2020

J of Neuroscience Research

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“…In this study, we controlled the hours of sunlight to avoid its potential influence on relationship between the temperature and psychiatric disorders. Higher sunlight exposure was proved to be positively associated with increasing admissions of bipolar disorder, suicide attempts and other psychiatric disorders ( Aguglia et al, 2017 , Aguglia et al, 2019b ), which could be explained by the damage of the excessive sunlight exposure on biological mechanisms through the dysregulation of serotonin and/or melatonin production or metabolism ( Abreu and Bragança, 2015 ; White et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Short-term effect of apparent temperature on daily emergency visits for mental and behavioral disorders in Beijing, China: A time-series study

Niu

Gao

Yang

et al. 2020

Science of The Total Environment

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Background The relationship between temperature and mental disorders is still unclear. This study aims to assess the short-term effect of apparent temperature (AT) on daily emergency visits of mental and behavioral disorders (MDs) in Beijing, China. Methods Daily counts of emergency visits related to MDs in Beijing from 2016 to 2018 were obtained. A quasi-Poisson generalized additive model combined with a distributed lag non-linear model (DLNM) was applied to analyze the lag-exposure-response relationship between AT and emergency admissions related to MDs. Sunshine duration, precipitation, PM 2.5 , SO 2 , O 3 , time trend, day of week and holiday were adjusted in the model. Results Total daily emergency visits for MDs during the study period were 16,606. With the reference of −2.4 °C (temperature with the minimum emergency visit risk), the single day effects of low AT (−8.6 °C, 10th percentile) and high AT (9.2 °C, 90th percentile) on MDs emergency visits reached a relative risk peak of 1.043 (95%CI: 1.017–1.069) on lag day 4 and 1.105 (95%CI: 1.006–1.215) on lag day 1, respectively. The greatest cumulative effect of high AT emerged on lag 0–5 days and reached a relative risk of 1.435 (95%CI: 1.048–1.965), while no significant cumulative effect of low AT was observed. There was a significant effect of high AT on emergency visits of MDs due to psychoactive substance use and male patients. Conclusions Both low and high AT are demonstrated to be the significant risk factors of MDs, which highlights the need of strengthening the health interventions, patient medical services and early warning for patients.

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“…Several mechanisms might underlie seasonality, involving photoperiod and sunlight exposure, 15 temperament, 16 chronotype, 17 and gender 18 . Globally, the clinical correlates of seasonality broadly point toward a more severe clinical profile 15 . In BD, in addition to mood episode recurrence, seasonal variations may affect cognitive functions, 19 aggressive behavior, 20,21 or psychotic symptoms 22 …”

Section: Introductionmentioning

confidence: 99%

“…11 Indeed, seasonality is associated with a positive family history of BD 12 and it also shows heritability in twin studies. 13,14 Several mechanisms might underlie seasonality, involving photoperiod and sunlight exposure, 15 temperament, 16 chronotype, 17 and gender. 18 Globally, the clinical correlates of seasonality broadly point toward a more severe clinical profile.…”

Section: Introductionmentioning

confidence: 99%

“…18 Globally, the clinical correlates of seasonality broadly point toward a more severe clinical profile. 15 In BD, in addition to mood episode recurrence, seasonal variations may affect cognitive functions, 19 aggressive behavior, 20,21 or psychotic symptoms. 22 However, the clinical characterization and relevance of seasonality are not yet clear, nor whether different patterns are present according to BD subtype or not, as previously hypothesized.…”

Section: Introductionmentioning

confidence: 99%

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Clinical correlates of seasonality in bipolar disorder: A specifier that needs specification?

Fico

Toffol

Anmella

et al. 2020

Acta Psychiatr Scand

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Objective Seasonal pattern (SP) is a bipolar disorder (BD) specifier that indicates a tendency towards affective relapses during specific moments of the year. SP affects 15%–25% of BD patients. In the past, SP was applied only to depressive relapses while, in DSM‐5, SP may be applied to both depressive and (hypo)manic episodes. We examined the association between different clinical correlates of BD and SP according to its current definition in a cohort of patients with BD type I (BDI) and II (BDII). Methods Patients were recruited from a specialized unit and assessed according to the season of relapse and type of episode per season. SP and non‐SP patients were compared looking into sociodemographic and clinical correlates. Significant variables at univariate comparisons were included in multivariate logistic regression with SP as the dependent variable. Results 708 patients were enrolled (503 BDI, 205 BDII), and 117 (16.5%) fulfilled DSM‐5 criteria for SP. The mean age was 45.3 years (SD = 14.18), and 389 were female (54.9%). The logistic regression model included a significant contribution of BDII (OR = 2.23, CI 1.4–3.55), family history of mood disorder (OR = 1.97, CI 1.29–3.01), undetermined predominant polarity (OR = 0.44, CI 0.28–0.70), and aggressive behavior (OR = 0.42, CI 0.23–0.75). Conclusion Our results outline a novel positive association of SP with undetermined predominant polarity, BDII, family history of mood disorder, and with fewer aggressiveness‐related symptoms. Seasonality is associated with a biphasic pattern with similar dominance of (hypo)mania and depression and is more frequent in BDII as compared to BDI. Seasonal episodes may be easier to predict, but difficult to prevent.

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The role of seasonality and photoperiod on the lethality of suicide attempts: A case-control study

Cited by 29 publications

References 87 publications

Short photoperiod restores ventral subicular lesion‐induced deficits in affective and socio‐cognitive behavior in male Wistar rats

Short photoperiod restores ventral subicular lesion‐induced deficits in affective and socio‐cognitive behavior in male Wistar rats

Short-term effect of apparent temperature on daily emergency visits for mental and behavioral disorders in Beijing, China: A time-series study

Clinical correlates of seasonality in bipolar disorder: A specifier that needs specification?

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