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Khan R, De S, Dewangan R, Tamboli R, Gupta R. Potential status of A1 and A2 variants of bovine beta-casein gene in milk samples of Indian cattle breeds. Anim Biotechnol 2023; 34:4878-4884. [PMID: 37071545 DOI: 10.1080/10495398.2023.2200502] [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: 04/19/2023]
Abstract
This study aimed to determine the polymorphism in 7th exon of beta-casein gene (CSN2) gene in seven domestic (Kosali, Tharparkar, Gangatiri, Sahiwal, Gir, Khariar, Motu) and two exotic cattle breeds (Jersey and Holstein-Friesian). Genomic DNA was extracted from 1000 milk samples, and the C > A polymorphism in CSN2 was determined using the tetra-primer amplification refractory mutation system-polymerase chain reaction method. In all Indigenous cattle breeds, the mean frequency of A1A2 and A2A2 genotypes was 0.19 and 0.80, respectively. The A1A1 genotype was absent in all seven domestic cattle breeds. The frequency of the A2A2 genotype was highest in the Gir breed (0.93). However, the Sahiwal, Tharparkar, and Motu breeds also had a higher frequency of A2A2 genotype compared to other breeds. In contrast, Gangatiri breed of India showed lowest frequency of A2A2 genotype. The mean A1 and A2 allele frequency was 0.09 and 0.91, respectively. In exotic breeds, the mean frequencies of the A1A1, A1A2, and A2A2 genotypes were 0.42, 0.55, and 0.03, respectively. Similarly, the mean A1 and A2 allele frequency was 0.69 and 0.31, respectively. This study suggests the high potential of Gir, Sahiwal, Tharparkar, and Motu cattle for A2 milk production since they carry a favorable A2 genotype.
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Affiliation(s)
- Rupali Khan
- Parul Institute of Applied Sciences, Parul University, Vadodara, India
| | - Sachinandan De
- Animal Biotechnology Center, National Dairy Research Institute, Karnal, India
| | | | | | - Reeshu Gupta
- Parul Institute of Applied Sciences, Parul University, Vadodara, India
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2
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Cieślińska A, Fiedorowicz E, Rozmus D, Sienkiewicz-Szłapka E, Jarmołowska B, Kamiński S. Does a Little Difference Make a Big Difference? Bovine β-Casein A1 and A2 Variants and Human Health-An Update. Int J Mol Sci 2022; 23:15637. [PMID: 36555278 PMCID: PMC9779325 DOI: 10.3390/ijms232415637] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022] Open
Abstract
For over 20 years, bovine beta-casein has been a subject of increasing scientific interest because its genetic A1 variant during gastrointestinal digestion releases opioid-like peptide β-casomorphin-7 (β-CM-7). Since β-CM-7 is involved in the dysregulation of many physiological processes, there is a growing discussion of whether the consumption of the β-casein A1 variant has an influence on human health. In the last decade, the number of papers dealing with this problem has substantially increased. The newest clinical studies on humans showed a negative effect of variant A1 on serum glutathione level, digestive well-being, cognitive performance score in children, and mood score in women. Scientific reports in this field can affect the policies of dairy cattle breeders and the milk industry, leading to the elimination of allele A1 in dairy cattle populations and promoting milk products based on milk from cows with the A2A2 genotype. More scientific proof, especially in well-designed clinical studies, is necessary to determine whether a little difference in the β-casein amino acid sequence negatively affects the health of milk consumers.
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Affiliation(s)
- Anna Cieślińska
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland
| | - Ewa Fiedorowicz
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland
| | - Dominika Rozmus
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland
| | - Edyta Sienkiewicz-Szłapka
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland
| | - Beata Jarmołowska
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland
| | - Stanisław Kamiński
- Department of Animal Genetics, University of Warmia and Mazury, 10-719 Olsztyn, Poland
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Hockey M, Aslam H, Berk M, Pasco JA, Ruusunen A, Mohebbi M, Macpherson H, Chatterton ML, Marx W, O'Neil A, Rocks T, McGuinness AJ, Young LM, Jacka FN. The Moo'D Study: protocol for a randomised controlled trial of A2 beta-casein only versus conventional dairy products in women with low mood. Trials 2021; 22:899. [PMID: 34895297 PMCID: PMC8665310 DOI: 10.1186/s13063-021-05812-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 11/09/2021] [Indexed: 12/28/2022] Open
Abstract
Background Beta-casein is a major protein in cow’s milk, of which A1 and A2 are the most frequent variants. Recent evidence implicates A1 beta-casein consumption in mechanisms that are of potential importance to mental health, yet its possible effects on psychological endpoints remains unknown. The primary aim of the study is to evaluate the comparative effects of consumption of dairy products containing A2 beta-casein versus conventional dairy (i.e. containing both A1 and A2 beta-casein) on symptoms of psychological distress in women with low mood. Methods ‘The Moo’D Study’ is a 16-week, superiority, 1:1 parallel group, triple-blinded, randomised controlled trial. Ninety women with low mood (Patient Health Questionnaire score ≥ 5) will be randomised to consume either A2 beta-casein only or conventional dairy products. The primary outcome, symptoms of psychological distress, will be measured by the 21-item Depression, Anxiety and Stress Scale. Secondary outcomes will include symptoms of depression, anxiety and stress, severity of low mood, cognition, gut microbiota composition, gut symptomatology, markers of immune function, gut inflammation, systemic metabolites, endothelial integrity and oxidative stress, body composition, perceived wellbeing, sleep, quality of life, resource use and cost-effectiveness. Discussion This study will advance our understanding of the possible impact of milk proteins on psychological distress in women as well as elucidate mechanisms underpinning any association. Given dairy products form a substantial component of traditional and Western diets, the implications of these findings are likely to be of clinical and public health importance. Trial registration The trial protocol has been prospectively registered with the Australia and New Zealand Clinical Trials Registry, ACTRN12618002023235. Registered on 17 December 2018. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-021-05812-6.
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Affiliation(s)
- Meghan Hockey
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Hajara Aslam
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Michael Berk
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Orygen, The National Centre of Excellence in Youth Mental Health, Centre for Youth Mental Health, Florey Institute for Neuroscience and Mental Health and the Department of Psychiatry, The University of Melbourne, Melbourne, Australia
| | - Julie A Pasco
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Department of Epidemiology and Preventive Medicine, Monash University, Prahran, VIC, Australia.,Department of Medicine-Western Health, The University of Melbourne, St Albans, VIC, Australia
| | - Anu Ruusunen
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.,Department of Psychiatry, Kuopio University Hospital, Kuopio, Finland
| | - Mohammadreza Mohebbi
- Biostatistics Unit, Faculty of Health, Deakin University, Burwood, VIC, 3125, Australia
| | - Helen Macpherson
- Institute for Physical Activity and Nutrition, Faculty of Health, Deakin University, Burwood, VIC, 3125, Australia
| | - Mary Lou Chatterton
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Institute for Health Transformation, Faculty of Health, Deakin University, Geelong, Australia
| | - Wolfgang Marx
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Adrienne O'Neil
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Tetyana Rocks
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Amelia J McGuinness
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Lauren M Young
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Felice N Jacka
- The Food & Mood Centre, IMPACT (the Institute for Mental and Physical Health and Clinical Translation), School of Medicine, Barwon Health, Deakin University, Geelong, Australia.
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Tarnowska K, Gruczyńska-Sękowska E, Kowalska D, Majewska E, Kozłowska M, Winkler R. The opioid excess theory in autism spectrum disorders - is it worth investigating further? Crit Rev Food Sci Nutr 2021:1-14. [PMID: 34702104 DOI: 10.1080/10408398.2021.1996329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Autism spectrum disorders (ASD) are defined as neurodevelopmental disorders, which are highly variable in nature and do not form a uniform picture, either in terms of symptomatology or depth of the disturbance. Diagnosis of ASD is made for children who show signs of impairment in social interaction, communication and cognitive skills. The exact cause of autism spectrum disorders has not been determined to date. Although there is no cure for ASD, a variety interventions have been proposed. The most commonly used restrictive dietary intervention is the gluten-free casein-free diet (GFCF), which is based on the opioid excess theory. This paper summarizes and discusses research on the core elements of the opioid excess theory in ASD: increased levels of opioid peptides in body fluids in ASD patients, increased intestinal permeability, altered peptidase activity and the effectiveness of GFCF diet in alleviating symptoms of ASD. Furthermore, we discuss the difficulties and their causes in conducting research with ASD patients. The assumptions of the opioid excess theory have neither been definitively confirmed nor disproved. Research in this area should continue, taking into account the highest possible quality standards and the specific needs and abilities of patients with ASD and their families.
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Affiliation(s)
- Katarzyna Tarnowska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - Eliza Gruczyńska-Sękowska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - Dorota Kowalska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - Ewa Majewska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - Mariola Kozłowska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - Renata Winkler
- Department of Organizational Behaviors, Cracow University of Economics, Cracow, Poland
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5
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Potential of Salivary Biomarkers in Autism Research: A Systematic Review. Int J Mol Sci 2021; 22:ijms221910873. [PMID: 34639213 PMCID: PMC8509590 DOI: 10.3390/ijms221910873] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/27/2021] [Accepted: 10/05/2021] [Indexed: 12/14/2022] Open
Abstract
The diagnostic process for autism spectrum disorders (ASD) is based on a behavioral analysis of the suspected individual. Despite intensive research, no specific and valid biomarker has been identified for ASD, but saliva, with its advantages such as non-invasive collection, could serve as a suitable alternative to other body fluids. As a source of nucleic acid of both human and microbial origin, protein and non-protein molecules, saliva offers a complex view on the current state of the organism. Additionally, the use of salivary markers seems to be less complicated not only for ASD screening but also for revealing the etiopathogenesis of ASD, since enrolling neurotypical counterparts willing to participate in studies may be more feasible. The aim of the presented review is to provide an overview of the current research performed on saliva in relation to ASD, mutual complementing, and discrepancies that result in difficulties applying the observed markers in clinical practice. We emphasize the methodological limitations of saliva collection and processing as well as the lack of information regarding ASD diagnosis, which is critically discussed.
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A1- and A2 beta-casein on health-related outcomes: a scoping review of animal studies. Eur J Nutr 2021; 61:1-21. [PMID: 34075432 PMCID: PMC8783860 DOI: 10.1007/s00394-021-02551-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 03/30/2021] [Indexed: 10/26/2022]
Abstract
PURPOSE Food-derived bioactive peptides may influence important physiological functions. An important example is beta-casomorphins, which are opioid peptides derived from A1 beta-casein in bovine milk and have been associated to be risk factors for non-communicable diseases in humans. A1 and A2 beta-casein are different with respect to the release of bioactive peptides, in particular BCM-7. However, evidence from human studies is limited and could be complemented with evidence derived from animal studies. We conducted a scoping review to identify animal studies investigating the effects of A1 beta-casein or BCM-7 compared to A2 beta-casein or any other intervention on health-related outcomes. METHODS We systematically searched for relevant studies in two electronic databases (Medline, Embase; last search performed March 2020). Two reviewers independently undertook study selection and data extraction of included references. Results were summarized tabularly and narratively. RESULTS We included 42 studies investigating various animal models, including rats, mice, rabbits, and dogs. Six studies investigated health-related outcomes of A1- vs. A2 milk, while most studies (n = 36) reported on physiological properties (e.g., analgesic effect) of BCM-7 as an opioid peptide. Included studies were extremely heterogeneous in terms of the study population, type of intervention and dose, and type of outcome measures. CONCLUSIONS Only a few studies comparing the effects of A1- and A2 milk were identified. More studies addressing this research question in animal models are needed to provide essential information to inform research gaps. Results from future studies could eventually complement research for humans, particularly when the body of evidence remains uncertain as is the case in the A1- and A2 milk debate.
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Abstract
A new type of cow’s milk, called A2 milk, has appeared in the dairy aisles of supermarkets in recent years. Cows’ milk generally contains two major types of beta-casein as A1 and A2 types, although there are 13 genetic variants of β-casein: A1, A2, A3, A4, B, C, D, E, F, H1, H2, I and G. Studies have shown that A1 β-casein may be harmful, and A2 β-casein is a safer choice for human health especially in infant nutrition and health. The A2 cow milk is reportedly easier to digest and better absorb than A1 or other types of milk. The structure of A2 cow’s milk protein is more comparable to human breast milk, as well as milk from goats, sheep and buffalo. Digestion of A1 type milk produces a peptide called β-casomorphin-7 (BCM-7), which is implicated with adverse gastrointestinal effects on milk consumption. In addition, bovine milk contains predominantly αs1-casein and low levels or even absent in αs2-casein, whereby caprine milk has been recommended as an ideal substitute for patients suffering from allergies against cow milk protein or other food sources. Since goat milk contains relatively low levels of αs1-casein or negligible its content, and αs2-casein levels are high in the milk of most dairy goat breeds, it is logical to assume that children with a high milk sensitivity to αs1-casein should tolerate goat milk well. Cow milk protein allergy (CMPA) is considered a common milk digestive and metabolic disorder or allergic disease with various levels of prevalence from 2.5% in children during the first 3 years of life to 12–30% in infants less than 3 months old, and it can go up to even as high as 20% in some countries. CMPA is an IgE-mediated allergy where the body starts to produce IgE antibodies against certain protein (allergens) such as A1 milk and αs1-casein in bovine milk. Studies have shown that ingestion of β-casein A1 milk can cause ischemic heart disease, type-1 diabetes, arteriosclerosis, sudden infant death syndrome, autism, schizophrenia, etc. The knowledge of bovine A2 milk and caprine αs2-casein has been utilized to rescue CMPA patients and other potential disease problems. This knowledge has been genetically applied to milk production in cows or goats or even whole herds of the two species. This practice has happened in California and Ohio, as well as in New Zealand, where this A2 cow milk has been now advanced commercially. In the USA, there have been even promotions of bulls, whose daughters have been tested homozygous for the A2 β-casein protein.
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Ledesma-Martínez E, Aguíñiga-Sánchez I, Weiss-Steider B, Rivera-Martínez AR, Santiago-Osorio E. Casein and Peptides Derived from Casein as Antileukaemic Agents. JOURNAL OF ONCOLOGY 2019; 2019:8150967. [PMID: 31582978 PMCID: PMC6754885 DOI: 10.1155/2019/8150967] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/20/2019] [Accepted: 08/04/2019] [Indexed: 12/20/2022]
Abstract
Milk is a heterogeneous lacteal secretion mixture of numerous components that exhibit a wide variety of chemical and functional activities. Casein, the main protein in milk, is composed of α-, β-, and κ-caseins, each of which is important for nutritional value and for promoting the release of cytokines, also are linked to the regulation of haematopoiesis and immune response and inhibit the proliferation and induce the differentiation of leukaemia cells. It has been shown that the digestive process of caseins leads to the release of bioactive peptides that are involved in the regulation of blood pressure and the inhibition or activation of the immune response by serving as agonists or antagonists of opioid receptors, thus controlling the expression of genes that exert epigenetic control. Later, they bind to opioid receptor, block nuclear factor κ-beta, increase the redox potential, and reduce oxidative stress and the pro-inflammatory agents that favour an antioxidant and anti-inflammatory environment. Therefore, the bioactive peptides of casein could be compounds with antileukaemia potential. This review provides a summary of current knowledge about caseins and casein peptides on the immune system as well as their roles in the natural defence against the development of leukaemia and as relevant epigenetic regulators that can help eradicate leukaemia.
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Affiliation(s)
- Edgar Ledesma-Martínez
- Haematopoiesis and Leukaemia Laboratory, Research Unit on Cell Differentiation and Cancer, FES Zaragoza, National Autonomous University of Mexico, 09230 Mexico City, Mexico
| | - Itzen Aguíñiga-Sánchez
- Haematopoiesis and Leukaemia Laboratory, Research Unit on Cell Differentiation and Cancer, FES Zaragoza, National Autonomous University of Mexico, 09230 Mexico City, Mexico
| | - Benny Weiss-Steider
- Haematopoiesis and Leukaemia Laboratory, Research Unit on Cell Differentiation and Cancer, FES Zaragoza, National Autonomous University of Mexico, 09230 Mexico City, Mexico
| | - Ana Rocío Rivera-Martínez
- Haematopoiesis and Leukaemia Laboratory, Research Unit on Cell Differentiation and Cancer, FES Zaragoza, National Autonomous University of Mexico, 09230 Mexico City, Mexico
| | - Edelmiro Santiago-Osorio
- Haematopoiesis and Leukaemia Laboratory, Research Unit on Cell Differentiation and Cancer, FES Zaragoza, National Autonomous University of Mexico, 09230 Mexico City, Mexico
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Aslam H, Ruusunen A, Berk M, Loughman A, Rivera L, Pasco JA, Jacka FN. Unravelled facets of milk derived opioid peptides: a focus on gut physiology, fractures and obesity. Int J Food Sci Nutr 2019; 71:36-49. [PMID: 31154909 DOI: 10.1080/09637486.2019.1614540] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Beyond being a source of key nutrients, bovine milk influences physiological functions by synthesising bioactive peptides during the process of digestion. Some of the claimed negative health outcomes associated with milk consumption, such as cardiovascular diseases and type 1 diabetes may be attributed to an opioid peptide, beta-casomorphin-7 (BCM-7), derived from A1 beta-casein. BCM-7 exerts its function by binding to the μ-opioid receptors in the body. It is hypothesised that activation of the μ-opioid receptors in the gut can alter gut microbial composition, impair gut barrier integrity and bile acid metabolism, in addition to increasing gastrointestinal transit time and gut inflammation. Further, it is hypothesised that BCM-7 may influence fractures and obesity via μ-opioid receptor pathways. In conclusion, it appears that BCM-7 might have multiple functions pertinent to human health; however, the evidence is limited and warrants further pre-clinical and clinical studies for hypothesis confirmation.
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Affiliation(s)
- Hajara Aslam
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia
| | - Anu Ruusunen
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia.,Department of Psychiatry, Kuopio University Hospital, Kuopio, Finland.,Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Michael Berk
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia.,Department of Psychiatry, Orygen Youth Health Research Centre and the Centre of Youth Mental Health, The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia.,Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia.,Barwon Health, Geelong, Australia
| | - Amy Loughman
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia
| | - Leni Rivera
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia.,Metabolic Research Unit, School of Medicine, Waurn Ponds, Deakin University Victoria, Geelong, Australia
| | - Julie A Pasco
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia.,Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia.,Barwon Health, Geelong, Australia.,Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, St Albans, Australia
| | - Felice N Jacka
- IMPACT Strategic Research Centre, School of Medicine, Deakin University, Geelong, Australia.,Department of Psychiatry, University of Melbourne, Melbourne, Australia.,Centre for Adolescent Health, Murdoch Children's Research Institute, Melbourne, Australia.,Black Dog Institute, New South Wales, Australia
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10
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Benoit S, Chaumontet C, Schwarz J, Cakir-Kiefer C, Tomé D, Miclo L. Mapping in mice the brain regions involved in the anxiolytic-like properties of α-casozepine, a tryptic peptide derived from bovine α s1 -casein. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.09.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Tomaka J, Karakuła-Juchnowicz H, Morylowska-Topolska J, Dzikowski M, Juchnowicz D, Flis M, Siek A, Próchnicki M. Review paper. Gluten-related disorders and schizophrenia - potential linking mechanisms, diagnostic and therapeutic challenge. CURRENT PROBLEMS OF PSYCHIATRY 2017. [DOI: 10.1515/cpp-2017-0001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Abstract
More and more evidence confirms the theory that the intake of cereal products containing gluten may play an important role in the pathogenesis of many diseases. There are also premises indicating the relationship between the so-called gluten-related diseases and the development and course of mental disorders, including schizophrenia.
The aim of this article is to review the literature on the potential relationship between the consumption of gluten and schizophrenia, considering the etiopathogenesis and the role of gluten-free diet in the treatment of schizophrenia.
Methods: There were analysed available research papers in PubMed and Google Scholar with the key words: schizophrenia, gluten- related disorders, allergy to grain products, celiac disease, microbiota, immune system, exorphins and time span: 1960-2016 .
Conclusions: Existing research results indicate a possible relationship between diet rich in grain products with high gluten content and the occurrence or exacerbation of schizophrenia symptoms. However, further studies are necessary to: 1) identify groups of patients for whom the consumption of cereal products (gluten) is associated with a particular risk of schizophrenia exacerbation, 2) determine the mechanisms relating the consumption of gluten with the mental state of schizophrenic patients, 3) get the possible benefits of implementing gluten-free diet in patients with schizophrenia.
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Affiliation(s)
- Joanna Tomaka
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin , Poland
| | - Hanna Karakuła-Juchnowicz
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, Lublin , Poland
- Department of Clinical Neuropsychiatry, Medical Universtiy in Lublin , Poland
| | | | - Michał Dzikowski
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin , Poland
| | - Dariusz Juchnowicz
- Department of Psychiatric Nursing, Medical University of Lublin , Poland
| | - Marta Flis
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin , Poland
| | - Aleksandra Siek
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin , Poland
| | - Michał Próchnicki
- I Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin , Poland
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12
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Cade R, Privette M, Fregly M, Rowland N, Sun Z, Zele V, Wagemaker H, Edelstein C. Autism and Schizophrenia: Intestinal Disorders. Nutr Neurosci 2016; 3:57-72. [PMID: 27416160 DOI: 10.1080/1028415x.2000.11747303] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
We examined Dohan's hypothesis that schizophrenia is associated with the absorption of "exorphins" contained in gluten and casein. In addition, because of the work of Reichelt et al. (Reichelt, K.L., Saelid, G., Lindback, J. and Orbeck, H. (1986) Biological Psychiatry 21:1279-1290) and Rodriguez et al. (Rodriguez, Trav, A.L., Barreiro Marin, R, Galvez, Borrero, I.M., del Olmo Romero-Nieva, F. and Diaz Alvarez, A. (1994) Journal of Nervous and Mental Disease Aug; 182(8): 478-479), we carried out similar studies on a group of children with autism. In both syndromes we found similar patterns of peptide containing peaks (Ninhydrin positive) after molecular screening with Sephadex G-15. Immunoglobulin assay of IgA and IgG against gliadin and casein in serum was done. High titer IgG antibodies to gliadin were found in 87% of autistic and 86% of schizophrenic patients and high titer IgG antibodies to bovine casein were found in 90% of autistic and in 93% of schizophrenic patients. High titer IgA antibodies to gluten or casein were found in 30% of children with autism while in schizophrenic patients 86% had elevated IgA antibodies to gluten and 67% to casein; some normal children and adults have these antibodies but only in trace amounts. When schizophrenic patients were treated with dialysis or a gluten-casein free diet, or both (Cade, R., Wagemaker, H., Privette, R.M., Fregly, M., Rogers, J. and Orlando, J. (1990) Psychiatry: A World Prespective 1: 494-500) peptiduria and Brief Psychiatric Rating Scores fell while abnormal behavior diminished. A gluten-casein free diet was accompanied by improvement in 81% of autistic children within 3 months in most of the behavior categories. Our data provide support for the proposal that many patients with schizophrenia or autism suffer due to absorption of exorphins formed in the intestine from incomplete digestion of gluten and casein.
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Affiliation(s)
- R Cade
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - M Privette
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - M Fregly
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - N Rowland
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - Z Sun
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - V Zele
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - H Wagemaker
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
| | - C Edelstein
- a Departments of Medicine, Physiology, Psychology and Psychiatry , University of Florida , Gainesville , FL 32610-0204 , USA
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Knivsberg A, Reichelt K, Nødland M. Dietary Intervention for a Seven Year Old Girl with Autistic Behaviour. Nutr Neurosci 2016; 2:435-9. [DOI: 10.1080/1028415x.1999.11747297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Sun Z, Cade JR. A Peptide Found in Schizophrenia and Autism Causes Behavioral Changes in Rats. AUTISM : THE INTERNATIONAL JOURNAL OF RESEARCH AND PRACTICE 2016. [DOI: 10.1177/1362361399003001007] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In a previous study we showed that β-casomorphin-7 (β-CM7) is taken up by brain regions relevant to schizophrenia and autism. The present experiment was designed to find whether β-CM7 has any behavioral or analgesic effects in rats. About 65 seconds after treatment with different doses of β-CM7, rats became restless and ran violently, with teeth chattering and with rapid respiration. Seven minutes later, the rats became inactive with less walking, distancing themselves from the other rat in the same cage, and sitting in, or putting their head against, the corner of the cage. The sound response was reduced and social interaction was absent. One hour later, the rats showed hyperdefensiveness. The above behavioral effects of β-CM7 did not occur when rats were pretreated with naloxone (2 mg/kg, IP). The rats receiving saline did not show any behavioral changes throughout the 2 hour period of observation. β-CM7 also demonstrated analgesic effects, which could be blocked by naloxone. The results suggest that β-CM7 may play a role in behavioral disorders such as autism and schizophrenia.
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Bressan P, Kramer P. Bread and Other Edible Agents of Mental Disease. Front Hum Neurosci 2016; 10:130. [PMID: 27065833 PMCID: PMC4809873 DOI: 10.3389/fnhum.2016.00130] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/10/2016] [Indexed: 12/16/2022] Open
Abstract
Perhaps because gastroenterology, immunology, toxicology, and the nutrition and agricultural sciences are outside of their competence and responsibility, psychologists and psychiatrists typically fail to appreciate the impact that food can have on their patients' condition. Here we attempt to help correct this situation by reviewing, in non-technical, plain English, how cereal grains-the world's most abundant food source-can affect human behavior and mental health. We present the implications for the psychological sciences of the findings that, in all of us, bread (1) makes the gut more permeable and can thus encourage the migration of food particles to sites where they are not expected, prompting the immune system to attack both these particles and brain-relevant substances that resemble them, and (2) releases opioid-like compounds, capable of causing mental derangement if they make it to the brain. A grain-free diet, although difficult to maintain (especially for those that need it the most), could improve the mental health of many and be a complete cure for others.
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Affiliation(s)
- Paola Bressan
- Department of General Psychology, University of PaduaPadova, Italy
| | - Peter Kramer
- Department of General Psychology, University of PaduaPadova, Italy
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16
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Behavioral effects of food-derived opioid-like peptides in rodents: Implications for schizophrenia? Pharmacol Biochem Behav 2015; 134:70-8. [PMID: 25661529 DOI: 10.1016/j.pbb.2015.01.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/09/2015] [Accepted: 01/28/2015] [Indexed: 01/08/2023]
Abstract
Dohan proposed that an overload of dietary peptides, such as those derived from wheat gluten and milk casein, could be a factor relevant to the development or maintenance of schizophrenia (SZ) symptoms in at least a subset of vulnerable individuals. Rodent behavioral models may offer insight into the plausibility of Dohan's exorphin hypothesis by providing a means to directly study the effects of such peptides. Accordingly, a review of the literature on the behavioral effects of food-derived opioid-like peptides in rodents was undertaken. Studies using a variety of behavioral tests to examine the effects of several classes of food-derived opioid-like peptides were identified and reviewed. Peptides derived from casein (β-casomorphins; BCMs, n=19), spinach (rubiscolins; RCs, n=4), and soy (soymorphins; SMs, n=1) were behaviorally active in various paradigms assessing nociception, spontaneous behavior, and memory. Surprisingly, only a single study evaluating a gluten-derived peptide (gliadorphin-7; GD-7, n=1) was identified and included in this review. In conclusion, food-derived peptides can affect rodent behavior, but more studies of GDs using diverse behavioral batteries are warranted. Assuming they occur in sufficient quantities during protein digestion and can access central opioid receptors (which entails crossing both the gastrointestinal and blood-brain barriers intact), these peptides may affect human behavior. Although BCMs and GDs may not be directly pathogenic in SZ, documented associations of casein and gluten sensitivity with SZ justify increased patient screening and dietary intervention where necessary.
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Abstract
Autism spectrum disorder (ASD) is characterised by deficits in the ability to socialise, communicate and use imagination, and displays of stereotypical behaviour. It is widely accepted that ASD involves a disorder in brain development. However, the real causes of the neurodevelopmental disorders associated with ASD are not clear. In this respect, it has been found that a majority of children with ASD display gastrointestinal symptoms, and an increased intestinal permeability. Moreover, large differences in microbiotic composition between ASD patients and controls have been reported. Therefore, nutrition-related factors have been hypothesised to play a causal role in the aetiology of ASD and its symptoms. Through a review of the literature, it was found that abnormalities in carbohydrate digestion and absorption could explain some of the gastrointestinal problems observed in a subset of ASD patients, although their role in the neurological and behavioural problems remains uncertain. In addition, the relationship between an improved gut health and a reduction of symptoms in some patients was evaluated. Recent trials involving gluten-free diets, casein-free diets, and pre- and probiotic, and multivitamin supplementation show contradictive but promising results. It can be concluded that nutrition and other environmental influences might trigger an unstable base of genetic predisposition, which may lead to the development of autism, at least in a subset of ASD patients. Clear directions for further research to improve diagnosis and treatment for the different subsets of the disorder are provided.
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Diolordi L, del Balzo V, Bernabei P, Vitiello V, Donini LM. Eating habits and dietary patterns in children with autism. Eat Weight Disord 2014; 19:295-301. [PMID: 24981567 DOI: 10.1007/s40519-014-0137-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 04/10/2014] [Indexed: 01/15/2023] Open
Abstract
The children with autism have feeding problems such as chewing, preference for the same food that often are responsible for the nutrient imbalance. In this study, we have analyzed the differences in food consumption (food frequency) and eating behavior (CEBI test) between children with autism and their typically developing peers. A statistically significant difference was observed between the two groups for the consumption of milk, yogurt, pulses, rice, and fruit juices (p ≤ 0,005). We observed a significant difference in the analysis of CEBI results when considering the 6- to 9.5-year-aged subgroup with autism vs control subgroup (103.50 and 110.14, respectively). The advices given by nutritionists have proved crucial to improve eating habits in children with autism, in the follow-up.
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Affiliation(s)
- Laura Diolordi
- Department of Experimental Medicine, Research Unit of Food Science and Human Nutrition, "Sapienza" University of Rome, p.le Aldo Moro, 5, 00185, Roma, Italy
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Royo LJ, del Cerro A, Vicente F, Carballal A, de la Roza-Delgado B. An accurate high-resolution melting method to genotype bovine β-casein. Eur Food Res Technol 2013. [DOI: 10.1007/s00217-013-2101-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Reichelt KL, Tveiten D, Knivsberg AM, Brønstad G. Peptides' role in autism with emphasis on exorphins. MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2012; 23:18958. [PMID: 23990835 PMCID: PMC3747763 DOI: 10.3402/mehd.v23i0.18958] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Problem The nature of the peptides found increased in urine from autism needs verification of their structure, especially those that show opioid activity. Methods The peptides were separated on reverse phase C-18 HPLC in Trifluoroacetic acid–acetonitril gradients. Peaks eluting where synthetic opioids appear, and peaks that are common to most autistic children were analyzed by mass spectrometry and fragmentation pattern on a quadropole mass-spectrometer. Results We could demonstrate exorphins in the urine from autistic children, and their length varied from one patient to the next. Conclusion Exorphins are found in urine of autistic children and may account for their symptoms.
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Affiliation(s)
- Karl L Reichelt
- Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
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21
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Cieślińska A, Kostyra E, Kostyra H, Oleński K, Fiedorowicz E, Kamiński S. Milk from cows of different β-casein genotypes as a source of β-casomorphin-7. Int J Food Sci Nutr 2011; 63:426-30. [DOI: 10.3109/09637486.2011.634785] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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22
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Wasilewska J, Sienkiewicz-Szłapka E, Kuźbida E, Jarmołowska B, Kaczmarski M, Kostyra E. The exogenous opioid peptides and DPPIV serum activity in infants with apnoea expressed as apparent life threatening events (ALTE). Neuropeptides 2011; 45:189-95. [PMID: 21334743 DOI: 10.1016/j.npep.2011.01.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 12/22/2010] [Accepted: 01/22/2011] [Indexed: 11/29/2022]
Abstract
Casein-derived peptides have been suggested to play a role in sudden infant death syndrome (SIDS). In this study, we have determined the content of bovine β-casomorphin-7 (bBCM-7) and the activity of dipeptidyl peptidase-IV (DPPIV) in sera of infants with apparent life threatening events (ALTE syndromes, 'near miss SIDS'). We have found that the sera of some infants after an apnoea event contained more β-casomorphin-7 than that of the healthy infants in the same age. In all the children after an apnoea event, however, a lowered DPPIV was detected. We suspect that the low activity of that peptidase may be responsible for opioid-induced respiratory depression, induced by bBCM-7 in the general circulation.
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Affiliation(s)
- Jolanta Wasilewska
- Department of Paediatrics, Gastroenterology and Allergic Diseases, The Medical University of Białystok, Poland
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23
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Wang Z, Wang W, Wang W, Xu L, Chen G, Fu F. Separation and determination of β-casomorphins by using glass microfluidic chip electrophoresis together with laser-induced fluorescence detection. J Sep Sci 2010; 34:196-201. [DOI: 10.1002/jssc.201000634] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Revised: 10/19/2010] [Accepted: 11/02/2010] [Indexed: 11/07/2022]
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Sienkiewicz-Szłapka E, Jarmołowska B, Krawczuk S, Kostyra E, Kostyra H, Bielikowicz K. Transport of bovine milk-derived opioid peptides across a Caco-2 monolayer. Int Dairy J 2009. [DOI: 10.1016/j.idairyj.2008.10.007] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Sienkiewicz-Szłapka E, Jarmołowska B, Krawczuk S, Kostyra E, Kostyra H, Iwan M. Contents of agonistic and antagonistic opioid peptides in different cheese varieties. Int Dairy J 2009. [DOI: 10.1016/j.idairyj.2008.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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26
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Elder JH. The gluten-free, casein-free diet in autism: an overview with clinical implications. Nutr Clin Pract 2009; 23:583-8. [PMID: 19033217 DOI: 10.1177/0884533608326061] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The prevalence of classic autism and autism spectrum disorder (ASD) appears to be on the rise, and to date, there remains no clear etiology or cure. Out of desperation, many families are turning to new therapies and interventions discovered through various media sources and anecdotal reports from other parents. Unfortunately, many of these newer, well-publicized interventions have little empirical support. One of the most popular yet currently scientifically unproven interventions for ASD is the gluten-free, casein-free (GFCF) diet. Clinicians working with families of individuals with ASD are often asked for advice and find themselves unable to offer the most up-to-date and scientifically credible information. This article provides an overview of ASD and the GFCF diet, a summary and critique of current research findings, recommendations for future research, and practical advice for families to use in deciding if a trial of the GFCF diet is in the best interest of their child and family.
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27
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Iwan M, Jarmołowska B, Bielikowicz K, Kostyra E, Kostyra H, Kaczmarski M. Transport of micro-opioid receptor agonists and antagonist peptides across Caco-2 monolayer. Peptides 2008; 29:1042-7. [PMID: 18355944 DOI: 10.1016/j.peptides.2008.01.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Revised: 01/17/2008] [Accepted: 01/25/2008] [Indexed: 11/23/2022]
Abstract
Milk is the source of beta-casomorphins--biologically active peptides with opioid activity--which are suspected to play various roles in the human body. The local influence of exogenous opioid peptides on gastrointestinal functions has been widely reported. After passing the gut barrier, beta-casomorphins may affect the functions of immunological system, as well as dopaminergic, serotoninergic and GABA-ergic systems in brain, regulate the opioid receptor development and elicit behavioral effects. However, possibilities and mechanisms of the intestinal transport of beta-casomorphins in human body in vivo have not been reported so far. In our research, the transepithelial transport of micro-opioid receptor agonists--human beta-casomorphin-5 and 7(BCM5, BCM7) and antagonist--lactoferroxin A (LCF A) have been investigated using Caco-2 monolayer. In order to determine the pathway of investigated peptide transport across Caco-2 monolayer, two directions of the transport (apical to basolateral and basolateral to apical) have been studied. All investigated peptides were transported across the human intestinal cell line Caco-2 and the curves of cumulative amount of transported peptides in time were linear in each case. In addition, the hydrolysis of beta-casomorphins during 60 min of experiment by dipeptidyl peptidase IV was observed. The data suggest the possibility of transport of opioid peptides derived from food across human intestinal mucosa.
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Affiliation(s)
- Małgorzata Iwan
- Faculty of Biology, University of Warmia and Mazury, Oczapowskiego 1A, 10-19 Olsztyn, Poland
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28
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Jarmołowska B, Sidor K, Iwan M, Bielikowicz K, Kaczmarski M, Kostyra E, Kostyra H. Changes of beta-casomorphin content in human milk during lactation. Peptides 2007; 28:1982-6. [PMID: 17869380 DOI: 10.1016/j.peptides.2007.08.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 08/02/2007] [Accepted: 08/03/2007] [Indexed: 11/26/2022]
Abstract
Milk is the best, complete food important for the development and nourishment of a neonate. Except for nutrients, milk contains biologically active opioid peptides derived from beta-casein, named beta-casomorphins (BCMs), which can exert effects in the gastrointestinal tract as well as in the whole body of neonates. The content of beta-casomorphins in human milk during maturation phases has not been studied so far. The aim of this study was to determine the content of beta-casomorphin-5 and -7 in human milk in different phases of lactation. A significantly higher concentration of both beta-casomorphins was found in colostrum than in mature milk. The concentration of beta-casomorphin in milk collected in the second month of lactation was similar to the level obtained in the fourth month of lactation. The content of beta-casomorphins in human milk was observed with the period of lactation. The level of opioid peptides may depend on the function of these peptides in neonate's body and may be associated with the maturation process.
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Affiliation(s)
- Beata Jarmołowska
- University of Warmia and Mazury, Oczapowskiego 1A, 10-719 Olsztyn, Poland
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29
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Elder JH, Shankar M, Shuster J, Theriaque D, Burns S, Sherrill L. The gluten-free, casein-free diet in autism: results of a preliminary double blind clinical trial. J Autism Dev Disord 2006; 36:413-20. [PMID: 16555138 DOI: 10.1007/s10803-006-0079-0] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This study tested the efficacy of a gluten-free and casein-free (GFCF) diet in treating autism using a randomized, double blind repeated measures crossover design. The sample included 15 children aged 2-16 years with autism spectrum disorder. Data on autistic symptoms and urinary peptide levels were collected in the subjects' homes over the 12 weeks that they were on the diet. Group data indicated no statistically significant findings even though several parents reported improvement in their children. Although preliminary, this study demonstrates how a controlled clinical trial of the GFCF diet can be conducted, and suggests directions for future research.
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Kalaydjian AE, Eaton W, Cascella N, Fasano A. The gluten connection: the association between schizophrenia and celiac disease. Acta Psychiatr Scand 2006; 113:82-90. [PMID: 16423158 DOI: 10.1111/j.1600-0447.2005.00687.x] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Schizophrenia affects roughly 1% of the population and is considered one of the top 10 causes of disability worldwide. Given the immense cost to society, successful treatment options are imperative. Based on initial findings, gluten withdrawal may serve as a safe and economical alternative for the reduction of symptoms in a subset of patients. METHOD A review of the literature relevant to the association between schizophrenia and celiac disease (gluten intolerance) was conducted. RESULTS A drastic reduction, if not full remission, of schizophrenic symptoms after initiation of gluten withdrawal has been noted in a variety of studies. However, this occurs only in a subset of schizophrenic patients. CONCLUSION Large-scale epidemiological studies and clinical trials are needed to confirm the association between gluten and schizophrenia, and address the underlying mechanisms by which this association occurs.
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Affiliation(s)
- A E Kalaydjian
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
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32
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Bell SJ, Grochoski GT, Clarke AJ. Health Implications of Milk Containing β-Casein with the A2Genetic Variant. Crit Rev Food Sci Nutr 2006; 46:93-100. [PMID: 16403684 DOI: 10.1080/10408390591001144] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Milk from dairy cows has long provided a high quality source of protein and selected micronutrients such as calcium to most populations. Recently, a relationship between disease risk and consumption of a specific bovine ss-casein fraction either A1 or A2 genetic variants has been identified. Populations, which consume milk containing high levels of ss-casein A2 variant, have a lower incidence of cardiovascular disease and type 1 diabetes. Furthermore, consumption of milk with the A2 variant may be associated with less severe symptoms of autism and schizophrenia. The mechanism of action focuses on ss-casein A1 and related forms preferentially that are able to produce a bioactive opioid peptide, ss-casomorphin-7 (ss-CM-7) during digestion. Infants may absorb ss-CM-7 due to an immature gastrointestinal tract. Adults, on the other hand, appear to reap the biological activity locally on the intestinal brush boarder. ss-CM-7 can potentially affect numerous opioid receptors in the nervous, endocrine, and immune systems. Whether there is a definite health benefit to milk containing the A2 genetic variant is unknown and requires further investigation.
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Affiliation(s)
- Stacey J Bell
- Research and Development, Ideasphere, Inc., 56 Amherst Road, Belmont, MA, 02478, USA.
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33
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Abstract
Sudden infant death syndrome (SIDS) is the most common cause of death in infants and its pathogenesis is complex and multifactorial. The aim of this review is to summarize recent novel findings regarding the possible association of beta-casomorphin (beta-CM) to apnea in SIDS, which has not been widely appreciated by pediatricians and scientists. beta-CM is an exogenous bioactive peptide derived from casein, a major protein in milk and milk products, which has opioid activity. Mechanistically, circulation of this peptide into the infant's immature central nervous system might inhibit the respiratory center in the brainstem leading to apnea and death. This paper will review the possible relationship between beta-CM and SIDS in the context of passage of beta-CM through the gastrointestinal tract and the blood-brain barrier (BBB), permeability of the BBB to peptides in infants, and characterization of the casomorphin system in the brain.
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Affiliation(s)
- Zhongjie Sun
- Department of Medicine, College of Medicine, University of Florida, Box 100274, 1600 SW Archer Road, Gainesville, FL 32610, USA.
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Abstract
Autism is a life-long developmental disorder affecting as many as 1 in 500 children. The causes for this profound disorder are largely unknown. Recent research has uncovered pathology in the gastrointestinal tract of autistic children. The pathology, reported to extend from the esophagus to the colon, is described here along with other studies pointing to a connection between diet and the severity of symptoms expressed in autism. The evidence that there is impaired intestinal permeability in autism is reviewed, and various theories are discussed by which a leaky gut could develop. Lastly, some possible ways in which impaired gastrointestinal function might influence brain function are discussed.
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Affiliation(s)
- John F White
- Department of Physiology, Emory University, Atlanta, Georgia 30322, USA.
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35
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Reichelt KL, Knivsberg AM. Can the pathophysiology of autism be explained by the nature of the discovered urine peptides? Nutr Neurosci 2003; 6:19-28. [PMID: 12608733 DOI: 10.1080/1028415021000042839] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Opioid peptides derived from food proteins (exorphins) have been found in urine of autistic patients. Based on the work of several groups, we try to show that exorphins and serotonin uptake stimulating factors may explain many of the signs and symptoms seen in autistic disorders. The individual symptoms ought to be explainable by the properties and behavioural effects of the found peptides. The data presented form the basis of an autism model, where we suggest that exorphins and serotonin uptake modulators are key mediators for the development of autism. This may be due to a genetically based peptidase deficiency in at least two or more peptidases and, or of peptidase regulating proteins made manifest by a dietary overload of exorphin precursors such as by increased gut uptake.
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Affiliation(s)
- K L Reichelt
- Institute of Pediatric Research, Univ of Oslo, Rikshospitalet, N-0027, Oslo, Norway.
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36
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Abstract
This paper discusses the effects of gliadorphin-7 (GD-7) infusion in rats and contrasts them with those of beta-casomorphin-7 (betaC-7). Both induce FLI in a dose related fashion. Very strong expression in both geniculate nuclei (GN) and the alveus hippocampus follow GD-7 400 microgram and betaC-7 30 microgram/kg BW. GD-7 affects only these three regions while betaC-7affects 45. FLI is prevented by Naloxone 2mg/kg BW in all regions except the GN where it is diminished 60%. betaC-7 causes bizarre behavior beginning 60s after infusion is started. GD-7 causes no behavioral change. These findings suggest GD-7 gains access to brain cells by diffusion through circumventricular organs while betaC-7 passes the BBB by carrier facilitation.
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Affiliation(s)
- Zhongjie Sun
- Departments of Medicine and Physiology, University of Florida, HSC, 32610-0204, Gainesville, FL, USA
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37
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Knivsberg AM, Reichelt KL, Høien T, Nødland M. A randomised, controlled study of dietary intervention in autistic syndromes. Nutr Neurosci 2002; 5:251-61. [PMID: 12168688 DOI: 10.1080/10284150290028945] [Citation(s) in RCA: 152] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Impaired social interaction, communication and imaginative skills characterize autistic syndromes. In these syndromes urinary peptide abnormalities, derived from gluten, gliadin, and casein, are reported. They reflect processes with opioid effect. The aim of this single blind study was to evaluate effect of gluten and casein-free diet for children with autistic syndromes and urinary peptide abnormalities. A randomly selected diet and control group with 10 children in each group participated. Observations and tests were done before and after a period of 1 year. The development for the group of children on diet was significantly better than for the controls.
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Affiliation(s)
- A M Knivsberg
- Center for Reading Research, Stavanger University College, Norway.
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Wakefield AJ, Puleston JM, Montgomery SM, Anthony A, O'Leary JJ, Murch SH. Review article: the concept of entero-colonic encephalopathy, autism and opioid receptor ligands. Aliment Pharmacol Ther 2002; 16:663-74. [PMID: 11929383 DOI: 10.1046/j.1365-2036.2002.01206.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
There is growing awareness that primary gastrointestinal pathology may play an important role in the inception and clinical expression of some childhood developmental disorders, including autism. In addition to frequent gastrointestinal symptoms, children with autism often manifest complex biochemical and immunological abnormalities. The gut-brain axis is central to certain encephalopathies of extra-cranial origin, hepatic encephalopathy being the best characterized. Commonalities in the clinical characteristics of hepatic encephalopathy and a form of autism associated with developmental regression in an apparently previously normal child, accompanied by immune-mediated gastrointestinal pathology, have led to the proposal that there may be analogous mechanisms of toxic encephalopathy in patients with liver failure and some children with autism. Aberrations in opioid biochemistry are common to these two conditions, and there is evidence that opioid peptides may mediate certain aspects of the respective syndromes. The generation of plausible and testable hypotheses in this area may help to identify new treatment options in encephalopathies of extra-cranial origin. Therapeutic targets for this autistic phenotype may include: modification of diet and entero-colonic microbial milieu in order to reduce toxin substrates, improve nutritional status and modify mucosal immunity; anti-inflammatory/immunomodulatory therapy; and specific treatment of dysmotility, focusing, for example, on the pharmacology of local opioid activity in the gut.
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Affiliation(s)
- A J Wakefield
- Inflammatory Bowel Disease Study Group, Centre for Gastroenterology, Department of Medicine, Royal Free and University College Medical School, London, UK.
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Abstract
Autism is a developmental disorder for which no cure currently exists. Gluten and/or casein free diet has been implemented to reduce autistic behaviour, in addition to special education, since early in the eighties. Over the last twelve years various studies on this dietary intervention have been published in addition to anecdotal, parental reports. The scientific studies include both groups of participants as well as single cases, and beneficial results are reported in all, but one study. While some studies are based on urinary peptide abnormalities, others are not. The reported results are, however, more or less identical; reduction of autistic behaviour, increased social and communicative skills, and reappearance of autistic traits after the diet has been broken.
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Affiliation(s)
- A M Knivsber
- Center for Reading Research, Stavanger College, Norway.
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Furlano RI, Anthony A, Day R, Brown A, McGarvey L, Thomson MA, Davies SE, Berelowitz M, Forbes A, Wakefield AJ, Walker-Smith JA, Murch SH. Colonic CD8 and gamma delta T-cell infiltration with epithelial damage in children with autism. J Pediatr 2001; 138:366-72. [PMID: 11241044 DOI: 10.1067/mpd.2001.111323] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVES We have reported colitis with ileal lymphoid nodular hyperplasia (LNH) in children with regressive autism. The aims of this study were to characterize this lesion and determine whether LNH is specific for autism. METHODS Ileo-colonoscopy was performed in 21 consecutively evaluated children with autistic spectrum disorders and bowel symptoms. Blinded comparison was made with 8 children with histologically normal ileum and colon, 10 developmentally normal children with ileal LNH, 15 with Crohn's disease, and 14 with ulcerative colitis. Immunohistochemistry was performed for cell lineage and functional markers, and histochemistry was performed for glycosaminoglycans and basement membrane thickness. RESULTS Histology demonstrated lymphocytic colitis in the autistic children, less severe than classical inflammatory bowel disease. However, basement membrane thickness and mucosal gamma delta cell density were significantly increased above those of all other groups including patients with inflammatory bowel disease. CD8(+) density and intraepithelial lymphocyte numbers were higher than those in the Crohn's disease, LNH, and normal control groups; and CD3 and plasma cell density and crypt proliferation were higher than those in normal and LNH control groups. Epithelial, but not lamina propria, glycosaminoglycans were disrupted. However, the epithelium was HLA-DR(-), suggesting a predominantly T(H)2 response. INTERPRETATION Immunohistochemistry confirms a distinct lymphocytic colitis in autistic spectrum disorders in which the epithelium appears particularly affected. This is consistent with increasing evidence for gut epithelial dysfunction in autism.
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Affiliation(s)
- R I Furlano
- University Department of Paediatric Gastroenterology, the Inflammatory Bowel Diseases Study Group, Royal Free and University College School of Medicine, London, United Kingdom
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Panksepp J. The Long-Term Psychobiological Consequences of Infant Emotions: Prescriptions for the Twenty-First Century. ACTA ACUST UNITED AC 2001. [DOI: 10.1080/15294145.2001.10773353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Panksepp J. The long-term psychobiological consequences of infant emotions: Prescriptions for the twenty-first century. Infant Ment Health J 2001. [DOI: 10.1002/1097-0355(200101/04)22:1<132::aid-imhj5>3.0.co;2-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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