Stereoisomer-specific reprogramming of a bacterial flagellin sialyltransferase.

Glycosylation of surface structures diversifies cells chemically and physically. Nucleotide-activated sialic acids commonly serve as glycosyl donors, particularly pseudaminic acid (Pse) and its stereoisomer legionaminic acid (Leg), which decorate eubacterial and archaeal surface layers or protein appendages. FlmG, a recently identified protein sialyltransferase, O-glycosylates flagellins, the subunits of the flagellar filament. We show that flagellin glycosylation and motility in Caulobacter crescentus and Brevundimonas subvibrioides is conferred by functionally insulated Pse and Leg biosynthesis pathways, respectively, and by specialized FlmG orthologs. We established a genetic glyco-profiling platform for the classification of Pse or Leg biosynthesis pathways, discovered a signature determinant of eubacterial and archaeal Leg biosynthesis, and validated it by reconstitution experiments in a heterologous host. Finally, by rewiring FlmG glycosylation using chimeras, we defined two modular determinants that govern flagellin glycosyltransferase specificity: a glycosyltransferase domain that either donates Leg or Pse and a specialized flagellin-binding domain that identifies the acceptor.

Electrophysiological and Behavioral Responses of Cabbage Aphid (Brevicoryne brassicae) to Rosemary (Rosmarinus officinalis) Volatiles, a Potential push Plant for Vegetable push-pull Cropping System.

The cabbage aphid (Brevicoryne brassicae) is a major pest of kale (Brassica oleraceae var. acephala), an important vegetable that is grown worldwide due to its high nutritional and economic value. Brevicoryne brassicae poses a great challenge to B. oleraceae var. acephala production, causing significant direct and indirect yield losses. Farmers overly rely on synthetic insecticides to manage the pest with limited success owing to its high reproductive behavior and development of resistance. This necessitates a search for sustainable alternatives to mitigate these challenges. This study assessed behavioral responses of B. brassicae to odors from rosemary (Rosmarinus officinalis) and B. oleraceae var. acephala headspace volatiles in a Perspex four-arm olfactometer. We identified and quantified volatiles emitted by each of the two plants and those eliciting antennal response using coupled gas chromatography-mass spectrometry (GC-MS) and GC-electroantennograhic detection(GC-EAD), respectively. Our findings revealed that B. brassicae spent more time in the arms of the olfactometer that contained B. oleraceae var. acephala volatiles compared to the arm that held R. officinalis volatiles. Additionally, B. brassicae spent more time in the olfactometer arms with B. oleracea var. acephala compared to the arms holding B. oleracea var. acephala and R. officinalis enclosed together and clean air. GC-MS analysis revealed diverse and higher quantities of volatile compounds in R. officinalis compared to B. oleraceae var. acephala. GC-EAD analysis showed that antennae of B. brassicae detected Linalool, α-Terpineol, Verbenone, Geraniol, Camphor, and Borneol from the volatiles of R. officinalis, and Sabinene, γ-Terpinene, and ß-Caryophyllene from B. oleraceae var. acephala volatiles. Our findings demonstrate the potential of R. officinalis as a repellent plant against B. brassicae and could be utilized as a 'push' plant in an intercropping strategy against this pest.

Ultrastable and Responsive Foams Based on 10-Hydroxystearic Acid Soap for Spore Decontamination.

Currently, there is renewed interest in using fatty acid soaps as surfactants. Hydroxylated fatty acids are specific fatty acids with a hydroxyl group in the alkyl chain, giving rise to chirality and specific surfactant properties. The most famous hydroxylated fatty acid is 12-hydroxystearic acid (12-HSA), which is widely used in industry and comes from castor oil. A very similar and new hydroxylated fatty acid, 10-hydroxystearic acid (10-HSA), can be easily obtained from oleic acid by using microorganisms. Here, we studied for the first time the self-assembly and foaming properties of R-10-HSA soap in an aqueous solution. A multiscale approach was used by combining microscopy techniques, small-angle neutron scattering, wide-angle X-ray scattering, rheology experiments, and surface tension measurements as a function of temperature. The behavior of R-10-HSA was systematically compared with that of 12-HSA soap. Although multilamellar micron-sized tubes were observed for both R-10-HSA and 12-HSA, the structure of the self-assemblies at the nanoscale was different, which is probably due to the fact that the 12-HSA solutions were racemic mixtures, while the 10-HSA solutions were obtained from a pure R enantiomer. We also demonstrated that stable foams based on R-10-HSA soap can be used for cleaning applications, by studying spore removal on model surfaces in static conditions via foam imbibition.

Decontamination of Spores on Model Stainless-Steel Surface by Using Foams Based on Alkyl Polyglucosides.

In the food industry, the surfaces of processing equipment are considered to be major factors in the risk of food contamination. The cleaning process of solid surfaces is essential, but it requires a significant amount of water and chemicals. Herein, we report the use of foam flows based on alkyl polyglucosides (APGs) to remove spores of Bacillus subtilis on stainless-steel surfaces as the model-contaminated surface. Sodium dodecyl sulfate (SDS) was also studied as an anionic surfactant. Foams were characterized during flows by measuring the foam stability and the bubble size. The efficiency of spores' removal was assessed by enumerations. We showed that foams based on APGs could remove efficiently the spores from the surfaces, but slightly less than foams based on SDS due to an effect of SDS itself on spores removal. The destabilization of the foams at the end of the process and the recovery of surfactant solutions were also evaluated by using filtration. Following a life cycle assessment (LCA) approach, we evaluated the impact of the foam flow on the global environmental footprint of the process. We showed significant environmental impact benefits with a reduction in water and energy consumption for foam cleaning. APGs are a good choice as surfactants as they decrease further the environmental impacts.

Is Anorexia Truly a Contemporary Disease?

BACKGROUND: Anorexia nervosa (AN) is reported to be on the rise. However, instances of fasting have been noted since antiquity. Can modern diagnoses be applied to circumstances very different from our own? Is there a continuum of symptoms whose meanings have evolved over centuries, or is AN a recent development? SUBJECTS AND METHODS: A literature review was conducted. Twelve articles were found to be pertinent to the study, including several by Jacques Maître, who also published a book on the subject that was utilized. RESULTS: Few instances of fasting and no deaths from AN are reported in Western antiquity. With the advent of Christianity, prolonged fasting appears in the West. From the 12thcentury onwards, food deprivation becomes significant in women's spiritual lives, reaching a peak in inedia until the Renaissance. In 1873, Lasègue and Gull published a medical description of AN. Thereafter, AN fluctuated between being a distinct pathology and a symptom of another syndrome. Long considered a hysterical symptom, Freud initiated a shift toward sexual causality. In 1914, hypophyseal atrophy was considered a cause but was later forgotten. World War II did not produce instances of AN; food refusal has meaning only when food is abundant. During times of imposed famine, women's roles in food management and corpulence are valorized. In the 1960s, attention shifted to body image and an inability to cope with pubertal changes. Today, Russell describes a change in patient profiles with increased fear of weight gain and reduced fear of sexualization. CONCLUSION: Two opposing theses emerge. On one hand, it is argued that mystical fasts and AN cannot be linked and that AN is a recent disorder. Modern society subjects us to greater social pressures, forcing women to deny their biological roles in pursuit of thinness. On the other hand, AN is considered the heir to mystical fasting, as part of women's attempts to escape societal roles. Hagiographic descriptions and psychoanalytic studies that highlight the unconscious dynamics between mother-daughter relationships and pubertal difficulties support this view.

Microbiota Diversity and Inflammation as a New Target to Improve Mood: Probiotic Use in Depressive Disorder.

BACKGROUND: There is a lot of evidence for a bidirectional communication between the gut and brain. Dysbiosis and increase intestinal permeability may lead to a systemic low-grade inflammatory response or various neuroactive bacterial metabolite may cross gut barrier. Pro-inflammatory cytokines or bacterial metabolites such as short-chain fatty acid (SCFA) are known to pass through blood brain barrier and altered neurotransmitter metabolism or increase production of neurotoxic pathways. In this review we hypothesized that restoring the gut microbiota ecosystem could improve mental disorders. We reviewed literature for human evidence proving clinical relevance of probiotics intake in mental disorders. SUBJECTS AND METHODS: We searched literature with keywords "depression" or "major depressive disorder" and "probiotic". We selected randomized control trial and we considered having both outcomes concerning impact on depressive symptoms but also on inflammation biomarkers, microbiota composition, cerebral nervous system or cognition. RESULTS: Seven out of fourteen randomized control trial reported significant improvement on depressive symptoms in patients taking probiotics. Besides improvement in depressive symptoms, we found decrease in inflammatory markers such as IL-6, decrease in serum kynurenine level, changes in microbiota diversity and abundance of species correlated to depressive disorder and higher cognitive performance. CONCLUSIONS: Probiotic seems to be secure and more effective on depression when used in supplement to usual antidepressant and in mild to moderate depression. We highlighted positive impact on vulnerability factors prevent further worsening. Probiotics could have anti-inflammatory effect acting on inflammatory markers well known to have a role on pathogenesis of depression. A strong correlation between neuroactive metabolites and a relative abundance of microbiota bacterial species underlined importance to consider the gut-brain axis in mental disorders.

COVID, the Main Cause of Mysery of Teenager? Retrospective Study of Hospitalizations of 15-25 in Psychosomatics (2018-2022).

BACKGROUND: Since the outbreak of COVID-19, there has been an apparent increase in the utilization of mental health services and psychiatric disorders among youth. However, there is little data on youth mental health prior to the pandemic. Some authors suggest that the increase in the use of psychiatric care started before. Are we facing a recent phenomenon initiated by the pandemic that will disappear with it, or did it highlight an older issue? Have the profiles of the young people and the care provided changed since the pandemic? SUBJECTS AND METHODS: Retrospective study of the hospitalization records of patients aged 15 to 25. The inclusion period extends from January 1, 2018, to December 31, 2022. RESULTS: There was an increase in the number of young people hospitalized from September 2020 to February 2021, suggesting a delayed effect of Covid's impact. 44% of young people were hospitalized through emergency services, number that has increased. There has been an increase in prior psychiatric care and hospitalizations among patients hospitalized since the beginning of the pandemic. 49% attribute their condition to family issues. Upon discharge, many patients were on medication, but there has been no significant change in prescriptions since the pandemic began. The majority of patients were referred to their primary care physician, psychologist, and psychiatrist, which has not changed since the pandemic began. CONCLUSIONS: Apart from the increase in hospitalizations, the rest of the practices within the institution has remained unchanged, suggesting that there are few differences in issues brought by patients since the start of the pandemic. Difficulties related to the family environment remain the primary reason for hospitalization requests. We do not have clear evidence of a worsening situation, which tends to support the hypothesis that COVID-19 has been a catalyst for a pre-existing state.

How to Improve Collaboration Between General Practitioners and Clinical Psychologists for Their Patients' Common Mental Health Problems in Primary Care Context?

BACKGROUND: Mental health problems have become a major topic of public health these last years, particularly since the pandemic of COVID-19. Primary care givers are confronted with high rates of common mental health problems (CMHPs) in population. This questions healthcare organization and specifically collaboration between general practitioners (GPs) and clinical psychologists (CPs). In this paper we aim to review recent literature to identify factors that facilitate or hinder collaboration between GPs and CPs when caring for their patients' CMHPs. METHODS: A non-systematic qualitative literature review was performed, using the PRISMA method. We restricted the review to papers published between 2010 and 2023. RESULTS: We identified 52 papers and after filtering, only 6 were included in the synthesis. Six main themes were identified: barriers to interprofessional collaboration, lack of mutual trust, mutual dissatisfaction with information exchanged, the paradox of professional secrecy, the necessity of a paradigm shift, and conceptual frameworks of collaboration. These themes were discussed to improve collaboration between GPs and CPs. CONCLUSION: This work provides some recommendations to support the development of interprofessional collaboration between GPs and CPs in primary care.

Can We Compare the Behaviour of the Zazous in the 1940s and Adolescents during the COVID-19 Crisis?

BACKGROUND: This article provides an insight into the behaviour of adolescents during the COVID-19 crisis through a comparison with the life of young people living in France under German occupation during the Second World War. METHOD: We conducted a literature review of articles in the CAIRN, SCOPUS and PsycINFO databases using the keywords zazou, adolescent and COVID-19. RESULTS: The zazou movement was a manifestation of young people's denial of the war through derision. Initially discredited, it was subsequently violently repressed by collaborationists and supporters of Marshal Pétain, as it was interpreted as an enemy of politics. In particular, it ran contrary to the Vichy regime's desire that young French men should spearhead the national revolution. The reaction among young people was to feel that they were being used by ageing politicians, who they considered were out of touch with reality. With respect to adolescents during the COVID-19 crisis, our review found that the French government has pressurised them to make sacrifices for the rest of the population, and has ignored their greater need for social links with peers. Many adolescents feel that they have been forgotten, in the midst of measures that have been imposed upon them with no explanation. This may have led, as in the 1940s, to a feeling of being instrumentalised and demonised by politicians. CONCLUSION: We argue that, in both cases, the dominant oppressive atmosphere has fostered similar behaviours and mental mechanisms. We therefore recommend that, rather than demonising young people, efforts should be made to include them in decision-making processes, in order to improve their understanding of the situation and encourage them to feel included.

Towards a Vulnerability Model for Major Depressive Episodes.

BACKGROUND: While many studies have investigated depression risk factors, few attempts have been made to weight, and compare them. Therefore, we conducted a prospective comparison of a sample of subjects suffering from major depressive disorder and a group of healthy subjects. We compared classic risk factors with internal elements such as personality, family dynamics and health locus of control. We also looked for prognostic factors. METHODS: Forty people with major depressive disorder (the MDD group) were randomly assigned to different treatment groups and followed for two years. In parallel, we followed a group of 21 healthy subjects (healthy group). At the beginning of the study, sociodemographic data were recorded and all subjects were asked to complete the Multidimensional Health Locus of Control (MHLC) scale, the NEO Five-Factor Inventory (NEO-FFI), and the Family Adaptation and Cohesion Scale (FACES III). During the study, subjects were regularly assessed using the Hamilton Depression Scale (HDS) and the Short Form Health Survey (SF-12). RESULTS: Of the 23 explanatory variables, 13 were statistically different (p≤0.05): age, gender, number of people living together, income, extravert personality and neuroticism, Internal HLC, Powerful others HLC, Adaptability of the current couple and the family of origin, and Cohesion of the ideal and nuclear family and family of origin. The accumulation of risk factors doubles the chances of suffering from MDD (odds ratio 1.905**). Independent of treatment, among the 13 variables, the first nine explain 34.1% of change in depression measured on the HDS scale (p<0.001). CONCLUSION: While the size of our sample limits the robustness of our results, our study suggests that some risk factors are also prognostic. The respective weights of these factors vary as a function of age group. Finally, some, such as health locus of control, family dynamics or extraversion, can be modified as an adjunct to pharmacological treatment.

The signaling peptide NprX controlling sporulation and necrotrophism is imported into Bacillus thuringiensis by two oligopeptide permease systems.

The infectious cycle of Bacillus thuringiensis in the insect host is regulated by quorum sensors of the RNPP family. The activity of these regulators is modulated by their cognate signaling peptides translocated into the bacterial cells by oligopeptide permeases (Opp systems). In B. thuringiensis, the quorum sensor NprR is a bi-functional regulator that connects sporulation to necrotrophism. The binding of the signaling peptide NprX switches NprR from a dimeric inhibitor of sporulation to a tetrameric transcriptional activator involved in the necrotrophic lifestyle of B. thuringiensis. Here, we report that NprX is imported into the bacterial cells by two different oligopeptide permease systems. The first one is Opp, the system known to be involved in the import of the signaling peptide PapR in B. thuringiensis and Bacillus cereus. The second, designated as Npp (NprX peptide permease), was not previously described. We show that at least two substrate binding proteins (SBPs) are able to translocate NprX through OppBCDF. In contrast, we demonstrate that a unique SBP (NppA) can translocate NprX through NppDFBC. We identified the promoter of the npp operon, and we showed that transcription starts at the onset of stationary phase and is repressed by the nutritional regulator CodY during the exponential growth phase.

Role of the global regulator Rex in control of NAD+ -regeneration in Clostridioides (Clostridium) difficile.

For the human pathogen Clostridioides (also known as Clostridium) difficile, the ability to adapt to nutrient availability is critical for its proliferation and production of toxins during infection. Synthesis of the toxins is regulated by the availability of certain carbon sources, fermentation products and amino acids (e.g. proline, cysteine, isoleucine, leucine and valine). The effect of proline is attributable at least in part to its role as an inducer and substrate of D-proline reductase (PR), a Stickland reaction that regenerates NAD+ from NADH. Many Clostridium spp. use Stickland metabolism (co-fermentation of pairs of amino acids) to generate ATP and NAD+ . Synthesis of PR is activated by PrdR, a proline-responsive regulatory protein. Here we report that PrdR, in the presence of proline, represses other NAD+ -generating pathways, such as the glycine reductase and succinate-acetyl CoA utilization pathways leading to butyrate production, but does so indirectly by affecting the activity of Rex, a global redox-sensing regulator that responds to the NAD+ /NADH ratio. Our results indicate that PR activity is the favored mechanism for NAD+ regeneration and that both Rex and PrdR influence toxin production. Using the hamster model of C. difficile infection, we revealed the importance of PrdR-regulated Stickland metabolism in the virulence of C. difficile.

Hydrophobicity of abiotic surfaces governs droplets deposition and evaporation patterns.

Surface contamination with droplets containing bacteria is of concern in the food industry and other environments where hygiene control is essential. Deposition patterns after the drying of contaminated droplets is affected by numerous parameters. The present study evaluated the rate of evaporation and the shape of deposition patterns after the drying of water droplets on a panel of materials with different surface properties (topography, hydrophobicity). The influence of the particle properties (in this study 1 µm-microspheres and two bacterial spores) was also investigated. Polystyrene microspheres were hydrophobic, while Bacillus spores were hydrophilic or hydrophobic, and surrounded by different surface features. In contrast to material topography, hydrophobicity was shown to deeply affect droplet evaporation, with the formation of small, thick deposits with microspheres or hydrophilic spores. Among the particle properties, the spore morphology (size and round/ovoid shape) did not clearly affect the deposition pattern. Conversely, hydrophobic spores aggregated to form clusters, which quickly settled on the materials and either failed to migrate, or only migrated to a slight extent on the surface, resulting in a steady distribution of spores or spore clusters over the whole contaminated area. Adherent bacteria or spores are known to be highly resistant to many stressful environmental conditions. In view of all the quite different patterns obtained following drying of spore-containing droplets, it seems likely that some of these would entail enhanced resistance to hygienic processes.

Multidisciplinary Management of Chronic Tinnitus in Audiophonology Centre: Survey of Psychiatric Comorbidities and Psychotropic Medications Use Over 10 Years of Activity.

BACKGROUND: The multidisciplinary management of disabling chronic tinnitus in the audiophonology centre demonstrates its relevance. The detection and treatment of overlapping psychiatric pathologies is a crucial issue in the work of liaison psychiatry. SUBJECTS AND METHODS: A 10-year retrospective review of the activities of a university audiophonology centre with 166 patients who consulted for disabling chronic tinnitus and who underwent a Mini International Neuropsychiatric Interview. The diagnostic criteria used were those of the DSM IV. RESULTS: Our sample shows that major depressive disorders, somatoform disorders and sleep disorders were the most frequently encountered. Alcohol misuse was also seen as the most common substance-related disorder. Thirty (30%) had prior psychiatric or psychological monitoring, and 60% were previously treated with at least one psychotropic drug. CONCLUSION: The systematic approach of liaison psychiatry appears to be essential in the treatment of disabling chronic tinnitus, given the associated psychiatric comorbidity. Beyond the detection of unrecognized or untreated disorders, patient education to attentional mechanisms and hypervigilance, which reinforce an unpleasant perception of tinnitus, as well as the management of stress and somatizations and sleep hygiene, is recommended.

Screen Time and (Belgian) Teenagers.

BACKGROUND: Parental anxiety about young people's use of media has increased with the advent of Generation Alpha. Excessive consumption is assumed to lead to a sedentary lifestyle, psychiatric disorders, overconsumption of sexual content and suicidal behaviour. But are these assumptions valid? METHODS: We supplemented data from the 2014 Health Behaviour in School-aged Children Study for Belgium with a bibliographical search of online databases (Medline, Scopus, PsycArticles, PsycInfo, PubMed) with the keywords 'adolescent' - 'internet' and 'sedentarity' or 'suicide' or 'family' or 'sex*' or 'porno*' for articles published between 2014 and 2019. We selected 27 original research articles and/ or quantitative or qualitative meta-analyses. RESULTS: Total consumption of different media (television, video games, internet) remained stable until 2010, and significantly increased in 2014. No parallel increase in sedentarity was reported. Controversy continues to surround the quantification of overconsumption, and the definition of 'problematic use'. Nevertheless, it appears that 5% of young people have unusual internet use, and 97.5% of these meet the criteria for a mental disorder. The risk of overconsumption is related to four factors: familial, personality, peer influence and supply. These general factors are supplemented by specific factors related to the abuse of sexual content and suicidal behaviour. For the latter, specific risk factors are the same as for suicidal young people who are not influenced by social media. CONCLUSION: Even if screen time is higher for Generation Alpha, these young people are no more at risk unless they accumulate risk factors. They are also exposed to challenges that researchers have not yet studied in any depth. One question relates to how they can manage their privacy if their parents published, without their consent, photographs of them as children? Another issue is their relationship to knowledge, given that everything they need to know can easily be found online.

Improving Transition from Child and Adolescent Mental Health Services to Adult Mental Health Services for Adolescents in Transition to Young Adulthood: A Literature Review.

BACKGROUND: These last years adolescents in transition to young adulthood (ATYA) have become a new matter of research. This population encounter specific issues and challenges regarding their mental health particularly when they have attained age boundaries and deal with the issue of transition from child and adolescent mental health services (CAMHS) to adult mental health services (AMHS). Many key questions regarding how to sustain continuity of mental health care for ATYA during transition remain. The aim of this paper is to review recent literature in the domain to identify dimensions that should be considered to improve ATYA transition from CAMHS to AMHS. SUBJECTS AND METHODS: A qualitative literature review was performed in Scopus-Elsevier database using the PRISMA method as reporting guidelines. Only papers discussing dimensions involved in the transition process from CAMHS to AMHS were considered. We restricted the review to researches published between 2010 and 2020. RESULTS: We identified 85 potential researches, after filtering; only 10 articles were finally included in the qualitative synthesis of the literature. Five main dimensions were identified: patient, professional, organization, policy, and ethic related. Those dimensions should be considered in order to improve ATYA transition process out of CAMHS to AMHS. CONCLUSION: This work contributes to identify principal dimensions that should be considered by mental health professionals and organizations in order to improve ATYA transition from CAMHS to AMHS.

From Family Surroundings to Intestinal Flora, A Literature Review Concerning Epigenetic Processes in Psychiatric Disorders.

BACKGROUND: Some behaviors or psychiatric conditions seem to be inherited from parents or explain by family environment. We hypothesized interactions between epigenetic processes, inflammatory response and gut microbiota with family surroundings or environmental characteristics. SUBJECTS AND METHODS: We searched in literature interactions between epigenetic processes and psychiatric disorders with a special interest for environmental factors such as traumatic or stress events, family relationships and also gut microbiota. We searched on Pubmed, PsycINFO, PsycARTICLES and Sciencedirect articles with the keywords psychiatric disorders, epigenome, microbiome and family relationships. RESULTS: Some gene polymorphisms interact with negative environment and lead to psychiatric disorders. Negative environment is correlated with different epigenetic modifications in genes implicated in mental health. Gut microbiota diversity affect host epigenetic. Animal studies showed evidences for a transgenerational transmission of epigenetic characteristics. CONCLUSIONS: Our findings support the hypothesis that epigenetic mediate gene-environment interactions and psychiatric disorders. Several environmental characteristics such as traumatic life events, family adversity, psychological stress or internal environment such as gut microbiota diversity and diet showed an impact on epigenetic. These epigenetic modifications are also correlated with neurophysiological, inflammatory or hypothalamic-pituitary-adrenal axis dysregulations.

Family relationships and health locus of control as covariables in the evolution of major depressive disorder.

BACKGROUND: In a two-year study, we compared the efficacy of noradrenergic and serotonergic antidepressants with and without the addition of 100 mg acetylsalicylic acid (ASA) in subjects suffering from major depressive disorder (MDD). In this article we examine the influence of the health locus of control, family relationships and personality traits on the progress of MDD. SUBJECTS AND METHODS: 40 people with MDD (MDD group) were randomly assigned to the different treatment groups. They were followed in parallel with a group of 20 'healthy' subjects (HG). At the beginning of the study, sociodemographic data were collected, and patients were asked to complete the Multidimensional Health Locus of Control (MHLC) scale, the NEO Five-Factor Inventory (NEO-FFI), and the Family Adaptation and Cohesion Scale (FACES III). During the study subjects were regularly assessed using the Hamilton Depression Scale (HDS), the Short Form Health Survey (SF-12) and the Clinical Global Impression scale (CGI). RESULTS: Regardless of the type of treatment, physical health is the best predictor of variation at two years in the MDD group; 45% of variance is explained by a linear regression model that includes three variables from the MHLC, FACES III and NEO-FFI scales. Similarly, 40% of CGI and 24% of HDS variance is predicted. These explanatory variables are statistically less powerful in the MDD group than the HG group. CONCLUSION: While drug treatment is a determinant in changes on the HDS, CGI and SF12 scales, factors such as family relationships, MHLC or personality are important covariates of these changes. The question remains whether we can influence these covariates to improve the response to antidepressants.

Role of gut microbiota in the interaction between immunity and psychiatry: a literature review.

BACKGROUND: Psychiatric disorders may be correlated with a low-grade systemic inflammation but the origin of this inflammatory response remains unclear and both genetics and environmental factors seems to be concerned. Recent researches observed that gut microbiota seems to have an impact on the brain and immune processes. METHOD: We review recent literature to a better understanding of how microbiota interacts with brain, immunity and psychiatric disorders. We search on Pubmed, PsycINFO, PsycARTICLES and Sciencedirect articles with the keywords "gastrointestinal microbiota" and "mental disorders" or "psychological stress". RESULTS: We showed links between gut microbiota and brain-gut axis regulation, immune and endocrine system activity, neurophysiological changes, behavior variations and neuropsychiatric disorders. Communications between brain and gut are bidirectional via neural, endocrine and immune pathway. Microbiota dysbiosis and increase gut permeability with subsequent immune challenges seems to be the source of the chronic mild inflammation associated with neuropsychiatric disorders. Repeated immune or stress events early in life may lead to neurodevelopmental disorders or sickness behavior later in life. CONCLUSIONS: Psychological stress impact gut microbiota with subsequent immune activation leading to neurodevelopmental disorders or sickness behavior and altering neurophysiology and reactivity to stress or lifestyle.

Mobius syndrome and obsessive compulsive disorder: a case report.

BACKGROUND: Mobius syndrome is characterized by a bilateral congenital paralysis of the facial and abducens nerves which leaves the subject with an expressionless "mask-like" face. SUBJECTS AND METHODS: Based on a literature review and a case discussion of an adult patient with Mobius syndrome and obsessive-compulsive disorder, initially undiagnosed and confused with a psychotic disorder, we will discuss the influence of Mobius syndrome in psychiatric evaluations. RESULTS: The lack of facial expressiveness and non-verbal emotional interactions may influence psychiatric evaluations and result in misdiagnosis and the inappropriate prescribing of antipsychotics. In the case analysis, we also observed other associated malformations such as renal atrophy, a bicuspid aortic valve and mitral valve prolapse. CONCLUSION: We feel that educating the patient about the communicative consequences of impaired facial expressions and facial interactions is a necessary prerequisite for any psychiatric or psychological evaluation in subjects with Mobius syndrome. We also recommend using caution when prescribing antipsychotics in patients with Mobius syndrome given the motor side effects secondary to a potentially pre-existing hypotonia.