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Xu J, Carroll IM, Huckins LM. Eating disorders: are gut microbiota to blame? Trends Mol Med 2024; 30:317-320. [PMID: 38040602 PMCID: PMC11009075 DOI: 10.1016/j.molmed.2023.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/28/2023] [Accepted: 11/07/2023] [Indexed: 12/03/2023]
Abstract
Gut microbiota could be involved in weight regulation and impact brain function via the gut-brain axis. Moreover, gut microbiota may impact the development of eating disorders (EDs) since they are characterized by weight-related concerns and symptoms and may represent a therapeutic target if future research can establish a causal link.
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Affiliation(s)
- Jiayi Xu
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.
| | - Ian M Carroll
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Laura M Huckins
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
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Landini L, Dadson P, Gallo F, Honka MJ, Cena H. Microbiota in anorexia nervosa: potential for treatment. Nutr Res Rev 2023; 36:372-391. [PMID: 35875979 DOI: 10.1017/s0954422422000130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Anorexia nervosa (AN) is characterised by the restriction of energy intake in relation to energy needs and a significantly lowered body weight than normally expected, coupled with an intense fear of gaining weight. Treatment of AN is currently based on psychological and refeeding approaches, but their efficacy remains limited since 40% of patients after 10 years of medical care still present symptoms of AN. The intestine hosts a large community of microorganisms, called the "microbiota", which live in symbiosis with the human host. The gut microbiota of a healthy human is dominated by bacteria from two phyla: Firmicutes and, majorly, Bacteroidetes. However, the proportion in their representation differs on an individual basis and depends on many external factors including medical treatment, geographical location and hereditary, immunological and lifestyle factors. Drastic changes in dietary intake may profoundly impact the composition of the gut microbiota, and the resulting dysbiosis may play a part in the onset and/or maintenance of comorbidities associated with AN, such as gastrointestinal disorders, anxiety and depression, as well as appetite dysregulation. Furthermore, studies have reported the presence of atypical intestinal microbial composition in patients with AN compared with healthy normal-weight controls. This review addresses the current knowledge about the role of the gut microbiota in the pathogenesis and treatment of AN. The review also focuses on the bidirectional interaction between the gastrointestinal tract and the central nervous system (microbiota-gut-brain axis), considering the potential use of the gut microbiota manipulation in the prevention and treatment of AN.
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Affiliation(s)
- Linda Landini
- S.S.D. Dietetics and Clinical Nutrition ASL 4 Chiavarese Liguria-Sestri Levante Hospital, Sestri Levante, Italy
| | - Prince Dadson
- Turku PET Centre, University of Turku, Turku, Finland
| | - Fabrizio Gallo
- S.S.D. Dietetics and Clinical Nutrition ASL 4 Chiavarese Liguria-Sestri Levante Hospital, Sestri Levante, Italy
| | | | - Hellas Cena
- Dietetics and Clinical Nutrition Laboratory, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
- Clinical Nutrition and Dietetics Service, Unit of Internal Medicine and Endocrinology, ICS Maugeri IRCCS, Pavia, Italy
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Marano G, Mazza M, Lisci FM, Ciliberto M, Traversi G, Kotzalidis GD, De Berardis D, Laterza L, Sani G, Gasbarrini A, Gaetani E. The Microbiota-Gut-Brain Axis: Psychoneuroimmunological Insights. Nutrients 2023; 15:nu15061496. [PMID: 36986226 PMCID: PMC10059722 DOI: 10.3390/nu15061496] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/18/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
There is growing interest in the role that the intestinal microbiota and the related autoimmune processes may have in the genesis and presentation of some psychiatric diseases. An alteration in the communication of the microbiota-gut-brain axis, which constitutes a communicative model between the central nervous system (CNS) and the gastro-enteric tract, has been identified as one of the possible causes of some psychiatric diseases. The purpose of this narrative review is to describe evidence supporting a role of the gut microbiota in psychiatric diseases and the impact of diet on microbiota and mental health. Change in the composition of the gut microbiota could determine an increase in the permeability of the intestinal barrier, leading to a cytokine storm. This could trigger a systemic inflammatory activation and immune response: this series of events could have repercussions on the release of some neurotransmitters, altering the activity of the hypothalamic-pituitary-adrenal axis, and reducing the presence of trophic brain factors. Although gut microbiota and psychiatric disorders seem to be connected, more effort is needed to understand the potential causative mechanisms underlying the interactions between these systems.
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Affiliation(s)
- Giuseppe Marano
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Marianna Mazza
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Francesco Maria Lisci
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Michele Ciliberto
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Gianandrea Traversi
- Unit of Medical Genetics, Department of Laboratory Medicine, Fatebenefratelli Isola Tiberina-Gemelli Isola, 00168 Rome, Italy
| | - Georgios Demetrios Kotzalidis
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Department of Neurosciences, Mental Health and Sensory Organs (NESMOS), Sant'Andrea Hospital, Sapienza University of Rome, 00189 Rome, Italy
| | | | - Lucrezia Laterza
- CEMAD Digestive Diseases Center, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Gabriele Sani
- Department of Geriatrics, Neuroscience and Orthopedics, Institute of Psychiatry and Psychology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Antonio Gasbarrini
- Internal Medicine and Gastroenterology, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy
| | - Eleonora Gaetani
- Department of Medical and Surgical Sciences, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
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Fetissov SO. Gut Microbiota–Brain Axis in Regulation of Feeding Behavior. Microorganisms 2023; 11:microorganisms11030749. [PMID: 36985322 PMCID: PMC10051356 DOI: 10.3390/microorganisms11030749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 02/26/2023] [Indexed: 03/17/2023] Open
Abstract
The survival of microorganisms inhabiting the intestinal tract depends on the nutrients provided by the host, with the latter obtaining them through food intake. It is hence not surprising that the co-evolution of gut bacteria and their hosts, including humans, shaped intrinsic interactions between their respective metabolisms with an impact on host feeding behavior. Understanding molecular pathways underlying such interactions may aid in the development of new therapeutic approaches for several pathological conditions accompanied by altered feeding behavior. A Special Issue titled “Gut Microbiota–Brain Axis in Regulation of Feeding Behavior” contributes to this topic of research, with eight papers covering its various aspects such as autoprobiotics, metabolic diseases and anorexia.
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Affiliation(s)
- Sergueï O Fetissov
- Regulatory Peptides-Energy Metabolism and Motivated Behavior Team, Neuroendocrine, Endocrine and Germinal Differentiation and Communication Laboratory, Inserm UMR1239, University of Rouen Normandie, 76000 Rouen, France
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Paszynska E, Hernik A, Slopien A, Boucher Y, Tyszkiewicz-Nwafor M, Roszak M, Bilska K, Dmitrzak-Weglarz M. Expression of salivary immunoglobulins and their association with analgesic neuropeptide opiorphin in anorexia nervosa during adolescence. J Eat Disord 2022; 10:118. [PMID: 35953876 PMCID: PMC9367138 DOI: 10.1186/s40337-022-00637-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/31/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Patients who suffer from anorexia nervosa (AN) are characterized by exceedingly lower body weight, micro- and macro-nutrient deficiencies, and hyposalivation as compared to healthy subjects. In addition, AN may predispose to difficulties in oral health maintenance. However, little is known about the relationship between stress-dependent salivary neuro/immunopeptidergic biomarkers such as opiorphin and immunoglobulins (Ig) and AN.The aim of this case-control study was to evaluate salivary opiorphin and immunoglobulins in female children and adolescents diagnosed with AN compared to healthy controls. METHODS Adolescent patients with clinically-confirmed severe restrictive subtype AN (Body Mass Index BMI < 15 kg/m2, mean age 15.0 ± 1.8, n = 83) were examined in the first week of hospital admission and compared to healthy matched controls (n = 79). Measurements of salivary opiorphin, IgA, IgG, IgM (ELISA technique), and oral hygiene levels (Plaque Control Record index-PCR) were performed. RESULTS In the AN group, a significantly higher concentration of opiorphin was evidenced (3.1 ± 4.1 ng/ml) compared to the control group (1.1 ± 1.2 ng/ml), (p < 0.001), contrary to IgM, which was significantly lower (311.0 ± 185.3 ng/ml) than in the control group (421.2 ± 168.1 ng/ml), (p < 0.001). There were no significant differences in the levels of IgA and IgG, despite a higher concentration of IgA in the AN group vs. controls (p = 0.14). Spearman analysis revealed a correlation between opiorphin and age (p < 0.05), but also with all immunoglobulins IgA, IgG, IgM (p = 0.006, p < 0.001, p < 0.001). Similarly a correlation was found between PCR index and immunoglobulins IgG, IgM (respectively p = 0.028, p < 0.001), and between body mass, BMI, IBW% and IgA, IgM (all p < 0.05). CONCLUSIONS In the acute phase of AN, salivary changes in opiorphin and immunoglobulins related to dental plaque suggest an essential role in oral health balance. Changes related to AN may affect the anti-inflammatory and analgesic components of saliva and suggest their use as neurobiological markers in severe malnutrition.
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Affiliation(s)
- Elzbieta Paszynska
- Department of Integrated Dentistry, Poznan University of Medical Sciences (PUMS), Bukowska St. 70, 60-812, Poznan, Poland.
| | - Amadeusz Hernik
- Department of Integrated Dentistry, Poznan University of Medical Sciences (PUMS), Bukowska St. 70, 60-812, Poznan, Poland
| | | | - Yves Boucher
- Université de Paris, LabNOF, 75013, Paris, France.,Groupe Hospitalier Pitié Salpêtrière, Paris, France
| | | | - Magdalena Roszak
- Department of Computer Science and Statistics, PUMS, Poznan, Poland
| | - Karolina Bilska
- Department of Psychiatric Genetics, Department of Psychiatry, PUMS, Poznan, Poland
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Déchelotte P, Breton J, Trotin-Picolo C, Grube B, Erlenbeck C, Bothe G, Fetissov SO, Lambert G. The Probiotic Strain H. alvei HA4597 ® Improves Weight Loss in Overweight Subjects under Moderate Hypocaloric Diet: A Proof-of-Concept, Multicenter Randomized, Double-Blind Placebo-Controlled Study. Nutrients 2021; 13:nu13061902. [PMID: 34205871 PMCID: PMC8227740 DOI: 10.3390/nu13061902] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/27/2021] [Accepted: 05/30/2021] [Indexed: 12/20/2022] Open
Abstract
Background: Increasing evidence supports the role of the gut microbiota in the control of body weight and feeding behavior. Moreover, recent studies have reported that the probiotic strain Hafnia alvei HA4597® (HA), which produces the satietogenic peptide ClpB mimicking the effect of alpha-MSH, reduced weight gain and adiposity in rodent models of obesity. Methods: To investigate the clinical efficacy of HA, 236 overweight subjects were included, after written informed consent, in a 12-week prospective, double-blind, randomized study. All subjects received standardized counselling for a −20% hypocaloric diet and were asked to maintain their usual physical activity. Subjects of the HA group received two capsules per day providing 100 billion bacteria per day and subjects in the Placebo (P) group received two placebo capsules. The primary endpoint was the percentage of subjects achieving a weight loss of at least 3% after 12 weeks. Intention-to-treat statistical analysis was performed using exact-Fischer, Mann-Whitney and paired-Wilcoxon tests as appropriate. Results: In the HA group, significantly more subjects (+33%) met the primary endpoint than in the P group (54.9 vs. 41.4%, p = 0.048). In the HA group, an increased feeling of fullness (p = 0.009) and a greater loss of hip circumference (p < 0.001) at 12 weeks were also observed. Fasting glycemia at 12 weeks was significantly lower (p < 0.05) in the HA compared to P group. Clinical and biological tolerance was good in both groups. Conclusions: A 12-week treatment with the probiotic strain H. alvei HA4597® significantly improves weight loss, feeling of fullness and reduction of hip circumference in overweight subjects following moderate hypocaloric diet. These data support the use of H. alvei HA4597® in the global management of excess weight.
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Affiliation(s)
- Pierre Déchelotte
- Inserm UMR 1073, 76000 Rouen, France;
- Nutrition Department, University Hospital, 76000 Rouen, France
- Department of Biology, Rouen Normandy University, 76130 Mont-Saint-Aignan, France;
- Correspondence:
| | - Jonathan Breton
- Inserm UMR 1073, 76000 Rouen, France;
- Nutrition Department, University Hospital, 76000 Rouen, France
- Department of Biology, Rouen Normandy University, 76130 Mont-Saint-Aignan, France;
| | | | - Barbara Grube
- Practice for General Medicine, 12169 Berlin, Germany;
| | | | - Gordana Bothe
- Analyze & Realize GmbH, 13467 Berlin, Germany; (C.E.); (G.B.)
| | - Sergueï O. Fetissov
- Department of Biology, Rouen Normandy University, 76130 Mont-Saint-Aignan, France;
- Inserm UMR 1239, 76130 Mont-Saint-Aignan, France
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Gutierrez Lopez DE, Lashinger LM, Weinstock GM, Bray MS. Circadian rhythms and the gut microbiome synchronize the host's metabolic response to diet. Cell Metab 2021; 33:873-887. [PMID: 33789092 DOI: 10.1016/j.cmet.2021.03.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 01/22/2021] [Accepted: 03/15/2021] [Indexed: 12/14/2022]
Abstract
The molecular circadian clock and symbiotic host-microbe relationships both evolved as mechanisms that enhance metabolic responses to environmental challenges. The gut microbiome benefits the host by breaking down diet-derived nutrients indigestible by the host and generating microbiota-derived metabolites that support host metabolism. Similarly, cellular circadian clocks optimize organismal physiology to the environment by influencing the timing and coordination of metabolic processes. Host-microbe interactions are influenced by dietary quality and timing, as well as daily light/dark cycles that entrain circadian rhythms in the host. Together, the gut microbiome and the molecular circadian clock play a coordinated role in neural processing, metabolism, adipogenesis, inflammation, and disease initiation and progression. This review examines the bidirectional interactions between the circadian clock, gut microbiota, and host metabolic systems and their effects on obesity and energy homeostasis. Directions for future research and the development of therapies that leverage these systems to address metabolic disease are highlighted.
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Affiliation(s)
- Diana E Gutierrez Lopez
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX 78712, USA
| | - Laura M Lashinger
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX 78712, USA
| | - George M Weinstock
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA; Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, Storrs, CT 06032, USA
| | - Molly S Bray
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX 78712, USA.
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Tirelle P, Breton J, Kauffmann A, Bahlouli W, L'Huillier C, Salameh E, Amamou A, Jarbeau M, Guérin C, Goichon A, do Rego JC, Déchelotte P, Ribet D, Coëffier M. Gut microbiota depletion affects nutritional and behavioral responses to activity-based anorexia model in a sex-dependent manner. Clin Nutr 2021; 40:2734-2744. [PMID: 33933739 DOI: 10.1016/j.clnu.2021.04.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/29/2021] [Accepted: 04/03/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND & AIMS In the last decade, the role of the microbiota-gut-brain axis in eating behavior and anxiety-depressive disorders has gained increasing attention. Although a gut microbiota dysbiosis has been reported in anorectic patients, its pathophysiological role remains poorly understood. Thus, we aimed to characterize the potential role of gut microbiota by evaluating the effects of its depletion in the Activity-Based Anorexia (ABA) mouse model both in male and female mice. METHODS Male and female C57Bl/6 mice were submitted (ABA group) or not (CT group) to the ABA protocol, which combines access to a running wheel with a progressive limited food access. Gut microbiota was previously depleted or not by a cocktail of antibiotics (ATB) delivered by oral gavages. We monitored body composition, anxiety-like behavior, leptin and adiponectin plasma levels, hypothalamic and hippocampal neuropeptides mRNA levels, as well as dopamine (DRD) and serotonin (5HT1 and 4) receptors mRNA expression. RESULTS In response to the ABA model, the body weight loss was less pronounced in ATB-treated ABA compared to untreated ABA, while food intake remained unaffected by ATB treatment. ATB-treated ABA exhibited increased fat mass and decreased lean mass compared to untreated ABA both in male and female mice, whereas but plasma adipokine concentrations were affected in a sex-dependent manner. Only male ABA mice showed a reduced anticipatory physical activity in response to ATB treatment. Similarly, anxiety-like behavior was mainly affected in ATB-treated ABA male mice compared to ATB-treated ABA female mice, which was associated with male-specific alterations of hypothalamic CRH mRNA and hippocampal DRD and 5-HT1A mRNA levels. CONCLUSIONS Our study provides evidence that ATB-induced gut microbiota depletion triggers alterations of nutritional and behavioral responses to the activity-based anorexia model in a sex-dependent manner.
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Affiliation(s)
- Pauline Tirelle
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Jonathan Breton
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France; Department of Nutrition, CHU Rouen, Rouen, France
| | - Alexandre Kauffmann
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Wafa Bahlouli
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Clément L'Huillier
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Emmeline Salameh
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Asma Amamou
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Marine Jarbeau
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Charlène Guérin
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Alexis Goichon
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Jean-Claude do Rego
- Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France; Animal Behavior Facility, SCAC, UNIROUEN, France
| | - Pierre Déchelotte
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France; Department of Nutrition, CHU Rouen, Rouen, France
| | - David Ribet
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France
| | - Moïse Coëffier
- Normandie University, UNIROUEN, INSERM UMR 1073 "Nutrition, Inflammation and Gut-brain Axis", Rouen, France; Institute for Research and Innovation in Biomedicine (IRIB), UNIROUEN, Rouen, France; Department of Nutrition, CHU Rouen, Rouen, France.
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Effects of Microbiota Imbalance in Anxiety and Eating Disorders: Probiotics as Novel Therapeutic Approaches. Int J Mol Sci 2021; 22:ijms22052351. [PMID: 33652962 PMCID: PMC7956573 DOI: 10.3390/ijms22052351] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 02/22/2021] [Accepted: 02/22/2021] [Indexed: 02/06/2023] Open
Abstract
Anxiety and eating disorders produce a physiological imbalance that triggers alterations in the abundance and composition of gut microbiota. Moreover, the gut–brain axis can be altered by several factors such as diet, lifestyle, infections, and antibiotic treatment. Diet alterations generate gut dysbiosis, which affects immune system responses, inflammation mechanisms, the intestinal permeability, as well as the production of short chain fatty acids and neurotransmitters by gut microbiota, which are essential to the correct function of neurological processes. Recent studies indicated that patients with generalized anxiety or eating disorders (anorexia nervosa, bulimia nervosa, and binge-eating disorders) show a specific profile of gut microbiota, and this imbalance can be partially restored after a single or multi-strain probiotic supplementation. Following the PRISMA methodology, the current review addresses the main microbial signatures observed in patients with generalized anxiety and/or eating disorders as well as the importance of probiotics as a preventive or a therapeutic tool in these pathologies.
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Smitka K, Prochazkova P, Roubalova R, Dvorak J, Papezova H, Hill M, Pokorny J, Kittnar O, Bilej M, Tlaskalova-Hogenova H. Current Aspects of the Role of Autoantibodies Directed Against Appetite-Regulating Hormones and the Gut Microbiome in Eating Disorders. Front Endocrinol (Lausanne) 2021; 12:613983. [PMID: 33953692 PMCID: PMC8092392 DOI: 10.3389/fendo.2021.613983] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 03/09/2021] [Indexed: 12/12/2022] Open
Abstract
The equilibrium and reciprocal actions among appetite-stimulating (orexigenic) and appetite-suppressing (anorexigenic) signals synthesized in the gut, brain, microbiome and adipose tissue (AT), seems to play a pivotal role in the regulation of food intake and feeding behavior, anxiety, and depression. A dysregulation of mechanisms controlling the energy balance may result in eating disorders such as anorexia nervosa (AN) and bulimia nervosa (BN). AN is a psychiatric disease defined by chronic self-induced extreme dietary restriction leading to an extremely low body weight and adiposity. BN is defined as out-of-control binge eating, which is compensated by self-induced vomiting, fasting, or excessive exercise. Certain gut microbiota-related compounds, like bacterial chaperone protein Escherichia coli caseinolytic protease B (ClpB) and food-derived antigens were recently described to trigger the production of autoantibodies cross-reacting with appetite-regulating hormones and neurotransmitters. Gut microbiome may be a potential manipulator for AT and energy homeostasis. Thus, the regulation of appetite, emotion, mood, and nutritional status is also under the control of neuroimmunoendocrine mechanisms by secretion of autoantibodies directed against neuropeptides, neuroactive metabolites, and peptides. In AN and BN, altered cholinergic, dopaminergic, adrenergic, and serotonergic relays may lead to abnormal AT, gut, and brain hormone secretion. The present review summarizes updated knowledge regarding the gut dysbiosis, gut-barrier permeability, short-chain fatty acids (SCFA), fecal microbial transplantation (FMT), blood-brain barrier permeability, and autoantibodies within the ghrelin and melanocortin systems in eating disorders. We expect that the new knowledge may be used for the development of a novel preventive and therapeutic approach for treatment of AN and BN.
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Affiliation(s)
- Kvido Smitka
- First Faculty of Medicine, Institute of Physiology, Charles University, Prague, Czechia
- First Faculty of Medicine, Institute of Pathological Physiology, Charles University, Prague, Czechia
- *Correspondence: Kvido Smitka,
| | - Petra Prochazkova
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Radka Roubalova
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Jiri Dvorak
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Hana Papezova
- Psychiatric Clinic, Eating Disorder Center, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
| | - Martin Hill
- Steroid Hormone and Proteofactors Department, Institute of Endocrinology, Prague, Czechia
| | - Jaroslav Pokorny
- First Faculty of Medicine, Institute of Physiology, Charles University, Prague, Czechia
| | - Otomar Kittnar
- First Faculty of Medicine, Institute of Physiology, Charles University, Prague, Czechia
| | - Martin Bilej
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Helena Tlaskalova-Hogenova
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
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