Signature Response to Light Therapy in Unipolar and Bipolar Major Depressive Episode (MDE)
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 173
- 试验地点
- 1
- 主要终点
- Therapeutic response to luminotherapy measured by the difference of Montgomery-Asberg Depression Rating Scale (MADRS) score between Visit 1 (inclusion) and Visit 4 (5 weeks)
研究概览
简要总结
Major depressive episode (MDE) are severe and common psychiatric disorders that affect up to 20% of the general population. MDE cause a decrease in psychosocial functioning, quality of life, and is associated with a high rate of suicides. They will be the leading cause of disability by 2030 according to the World Health Organization. The international effort carried out to identify biomarkers of MDE has been hampered by the heterogenous nature of MDE (unipolar, bipolar, seasonal, non-seasonal) and their heterogeneous response to treatment. Response rate to antidepressant drugs is only 40 to 50%, leading to the use of drug combinations and development of alternative therapeutics such as light therapy (LT). It was demonstrated that LT, as a first line treatment of MDE with and without seasonal pattern (± SP), has comparable efficacy to antidepressants. LT has the advantage of being also effective in improving both sleep, alertness and circadian rhythms, which may be altered in depression, contrary to antidepressant drugs that target mainly mood. Further research is warranted to determine the most efficient lighting parameters to use depending on depression characteristics, as well as to identify signature biomarkers of response. Besides, no studies have directly evaluated both subjective and objective biomarkers of sleep, wake, biological rhythms, and light signalling pathways and activation in patients with MDE ± SP. The main objective of the research will be to identify the signature of response to LT examining the correlation between the measures of biological and clinical parameters before LT and their evolution at the end of the procedure, and the therapeutic response.
The primary endpoint of the study will be the therapeutic response to LT measured by the difference of MADRS score between Visit 1 and Visit 4 (end of the therapeutic protocol). Therapeutic response to LT considered as a success will be defined as at least a 50% reduction of MADRS score between the two visits.
详细描述
Major Depressive Episodes (MDE) are severe and common conditions that affect up to 20% of the general population. MDE cause a decrease in psychosocial functioning, quality of life, and is associated with a high rate of suicides. They will be the leading cause of disability by 2030 according to the World Health Organization. The international effort carried out to identify biomarkers of MDE has been hampered by the heterogenous nature of MDE (unipolar, bipolar, seasonal, non-seasonal) and their heterogeneous response to treatment. Response rate to antidepressant drugs is only 40 to 50%, leading to the use of drug combinations and development of alternative therapeutics such as light therapy (LT). A recent meta-analysis demonstrated that LT, as a first line treatment of MDE with and without seasonal pattern (± SP), has comparable efficacy to antidepressants. LT has the advantage of being also effective in improving both sleep, alertness and circadian rhythms, which may be altered in depression, contrary to antidepressant drugs that target mainly mood. Further research is warranted to determine the most efficient lighting parameters to use depending on depression characteristics, as well as to identify signature biomarkers of response.
Light exerts powerful biological effects on mood regulation. A growing body of research supports the efficacy of light therapy (LT) for MDE ± SP. Light information is conveyed to the brain through intrinsically photosensitive retinal ganglion cells (ipRGCs) expressing the melanopsin photopigment. However, the respective contribution of the different photoreceptive systems (rods, cones, melanopsin) and the precise brain circuits that mediate the impact of light on depressive behaviours are not well understood. Recently, we summarised the two distinct retinabrain pathways of light effects on mood in humans and animals (mostly demonstrated in animal research): i) a suprachiasmatic nucleus (SCN)-dependent pathway (a.k.a the circadian pathway) with mood actions via synchronisation of circadian rhythms and other direct effects, and ii) a SCN-independent pathway with mood effects through modulation of the homeostatic process of sleep, alertness, and emotion regulation. It is now well-known that light plays a main role in mood regulation mainly via melanopsin-containing ipRGCs and their direct projections on brain structures. Interestingly, the amplitude of the prolonged pupil constriction after exposure to blue light, reflects the sensitivity of the melanopsin pathway, found to be reduced in MDE with SP and MDE without SP. The examination of retinal sensitivity using electroretinography (ERG) reported winter rod photoreceptors hyposensitivity to light in MDE with SP. Very few studies have shown an impact of LT on networks involved in MDE: emotion regulation networks (prefrontal-limbic anatomy and connectivity) and the glutamatergic system in the ACC. Most studies used LT in combination with sleep deprivation and/or SSRIs. The retina-brain pathways involved are little known, probably because of their small anatomical size, requiring very high spatial resolution, but preclinical models strongly suggest that habenula and thalami nuclei (SCN independent pathway) are crucial for the antidepressive effects of light therapy. Interestingly, thanks to 7T high resolution MRI, a recent study in unmedicated MDE patients found an increased habenula volume associated with disease severity, and preliminary results indicate that functional connectivity of the thalamic subnuclei is associated with mood variation in MDE. Moreover, immune disruption is evident in MDD, and light may influence mood through its effects on the immune system, which is regulated by the circadian clock. The number of immune cells circulating in the blood oscillates throughout the day, with a peak during the resting phase, and recruitment to specific tissues occurring preferentially during the active phase. This migration is so important that injecting pro-inflammatory agents into mice during the resting phase results in 70% mortality, compared with 30% during the active phase, when immune cells are unavailable and mainly found in tissues. This circadian migration pattern also influences the vaccine response, with a better response during the resting phase when lymphocytes are circulating.
In fact, there is a bidirectional relationship where inflammatory mediators regulate sleep by acting directly in specific brain systems and conversely, sleep deprivation leads to alterations in circulating immune cells.
It is now recognized that inflammation plays a role in the pathophysiology of depression and that several migration markers are affected. Given this potential alteration in immune cell migration and the fact that analyses are performed during the day, current studies therefore fail to capture the complexity of immune disturbances associated with MDD.
Beyond immune-related mechanisms, other biological factors may also play a role in the complex relationship between mood and disturbances of sleep and circadian rhythms. One such factor is Toxoplasma gondii (Tg) infection, a common parasitic condition affecting around 40% of the general population in France. Growing epidemiological evidence suggest a potential link between Tg infection and various neuropsychiatric disorders, including schizophrenia, mood disorders, and other behavioral and neurological conditions . Notably, Tg infection has been identified as a potential risk factor for the development of Major Depressive Disorder (MDD) as well as for insomnia in men over the age of 50. However, the heterogeneity in study designs and reported outcomes limits the generalizability and consistency of current findings.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Inclusion Criteria:
- •Adults between 18 and 65 years old
- •Patients with a diagnosis of MDE as part of a unipolar or bipolar disorder (DSM-5 TR criteria)
- •Patients with a clinician-rated MADRS score ≥ 20 indicating a moderate to severe depressive symptoms with a prescription of LT for MDE treatment
- •For patients with bipolar disorder type 1: With prophylactic mood stabilizer treatment at an effective dose (standardized and at a preventive dose for manic episode prevention) and stable for at least 4 weeks (background treatment for bipolar disorder): Lithium (Téralithe® LP 400 or 250) or Sodium Valproate (Dépakote® 500) or Atypical antipsychotics (also known as second-generation antipsychotics), defined as follows and dosed prior to inclusion in the month preceding:
- •For Lithium, controlled by serum lithium level, >0.5 mEq/L for Téralithe 250 and > 0.7 mEq/L for Téralithe LP 400 ; for Sodium Valproate, controlled by serum sodium divalproate level >40mg/L
- •For antipsychotics, only the following molecules will be accepted at the indicated dosages, as they have marketing authorization in France as prophylactic mood stabilizers for manic episode prevention in bipolar disorder: Quétiapine (≥150-800mg), Aripiprazole (≥ 15-30mg), Olanzapine (≥ 10-20mg)
- •Patients for whom light therapy is prescribed
- •Patients able to understand French.
- •Patients able to sign informed consent.
排除标准
- •Patients with a DSM-5 diagnosis of schizophrenia, suffering from paranoid or delusional disorders, any other psychotic features or other nonstabilized mental disorders
- •Patients with other antidepressant strategies than LT or mood stabiliser initiated in the month prior to inclusion
- •Patients with a therapeutic resistance of current MDE (lack of response to ≥2 antidepressants of 2 different classes at therapeutic doses for >6 weeks)
- •Patients with a LT used in the last 1 month
- •Patient with ophtalmic pathologies (cataract, glaucoma, age-related macular degeneration, severe myopia > 6D, etc.) or diseases affecting the retina (retinitis pigmentosa, diabetes, herpes, hereditary retinal disorders etc.).
- •Patient with photosensitive epilepsy
- •Patients with a C-SSRS score ≥ 4
- •For the MRI group, patient presenting one or several MRI contrindications
- •Shiftwork or self-imposed irregular sleep schedule within the last months
- •Travel acrosss 2 time-zones during the last month prior to participation
- •Pregnant or breastfeeding women
- •Subject under guardianship or deprived of liberty
- •Participation ton another interventional study
- •Healthy volonteers :
- •Inclusion criteria :
- •Adults between 18 and 65
- •Without any significant psychiatric history or current psychotropic medication
- •Able to understand French
- •Able to sign informed consent
- •Exclusion criteria :
- •Contra-indications to MRI (claustrophobia, metallic or material implants)
- •History of severe head injury
- •Pregnancy and breastfeeding woman
- •Inability to understand information about the study
- •Persons deprived of their liberty by judicial or administrative decision
- •Adult subject under legal protection or unable to consent
研究组 & 干预措施
Patient group
This corresponds to patients aged between 18 an 65 years-old with a diagnosis of major depressive episode as part of a unipolar or bipolar disorder. They will be exposed daily to 10 000-lux fluorescent white light box (French light box, Dayvia®, Slim style device) for 30 minutes, in the morning after awakening, between 7 and 9 am, over a period of 4 weeks.
干预措施: Light therapy (Device)
结局指标
主要结局
Therapeutic response to luminotherapy measured by the difference of Montgomery-Asberg Depression Rating Scale (MADRS) score between Visit 1 (inclusion) and Visit 4 (5 weeks)
时间窗: At baseline (visit 1 - week 0) and visit 4 (week 5)
Measurement of the depression severity score obtained from the Montgomery-Asberg Depression Rating Scale (MADRS) questionnaire before and after light therapy treatment. Score range (min - max): 0-60. Higher score relates to worse depression severity.
次要结局
- Change in sleep-wake regularity from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in wake after sleep onset (WASO) from baseline to post-light therapy using sleep diary in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in depressive symptoms from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in manic symptoms from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in suicidality symptoms from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in sleep quality from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in insomnia severity from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Evolution of sleepiness severity during light therapy treatment in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in chronotype from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Change in rythm parameters from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in social jetlag from baseline to post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Measure of the seasonal pattern in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion)
- Change in sleep latency from baseline to post-light therapy using sleep diary in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in total sleep time from baseline to post-light therapy using sleep diary in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in time spent in bed from baseline to post-light therapy using sleep diary in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in sleep efficiency from baseline to post-light therapy using sleep diary in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in presumed sleep time from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in wake after sleep onset (WASO) from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in fragmentation index from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Change in sleep efficiency from baseline to post-light therapy using actigraphy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(From enrollment to week 5)
- Measurement of the melanopsin sensitivity before and after LT in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At Visit 2 (week 1) and Last study visit (week 5))
- Subjective Light Sensitivity before and after LT in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Subjective Light Pain before and after LT in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion, Visit 3 (week 2) and Last study visit (week 5))
- Cone, rod and ganglion cells response to light therapy treatment in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At Visit 2 (week 1) and Last study visit (week 5))
- Change in sleep architecture before and after post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion and Last study visit (week 5))
- Change in ventilatory parameters before and after post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion and Last study visit (week 5))
- Objective sleep latency before and after LT in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion and Last study visit (week 5))
- Change in biological circadian biomarkers before and after post-light therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At inclusion and Last study visit (week 5))
- Change in blood immunological biomarkers before and after therapy in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At Visit 2 (week 1) and Last study visit (week 5))
- Evaluation of Toxoplasma gondii serology at baseline in each subgroupe (unipolar/bipolar with or not seasonality pattern)(At Visit 2 (week 1))
- Change in networks involved in MDE from baseline to post-light therapy in 40 patients (ratio 1:1 of seasonal and non seasonal pattern)(At inclusion and Last study visit (week 5))
- Change in networks involved in MDE at baseline in 20 controls(At inclusion)
- Tolerance to light therapy(At Visit 3 (week 2) and Last study visit (week 5))
- Corneal light exposure(From enrollment to week 5)