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Peel E, Hogg C, Belov K. Characterisation of defensins across the marsupial family tree. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 158:105207. [PMID: 38797458 DOI: 10.1016/j.dci.2024.105207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 05/23/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
Defensins are antimicrobial peptides involved in innate immunity, and gene number differs amongst eutherian mammals. Few studies have investigated defensins in marsupials, despite their potential involvement in immunological protection of altricial young. Here we use recently sequenced marsupial genomes and transcriptomes to annotate defensins in nine species across the marsupial family tree. We characterised 35 alpha and 286 beta defensins; gene number differed between species, although Dasyuromorphs had the largest repertoire. Defensins were encoded in three gene clusters within the genome, syntenic to eutherians, and were expressed in the pouch and mammary gland. Marsupial beta defensins were closely related to eutherians, however marsupial alpha defensins were more divergent. We identified marsupial orthologs of human DEFB3 and 6, and several marsupial-specific beta defensin lineages which may have novel functions. Marsupial predicted mature peptides were highly variable in length and sequence composition. We propose candidate peptides for future testing to elucidate the function of marsupial defensins.
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Affiliation(s)
- Emma Peel
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, New South Wales, 2006, Australia; Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Australia.
| | - Carolyn Hogg
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, New South Wales, 2006, Australia; Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Australia.
| | - Katherine Belov
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, New South Wales, 2006, Australia; Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, Australia.
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2
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Kountouras J, Boziki M, Kazakos E, Theotokis P, Kesidou E, Nella M, Bakirtzis C, Karafoulidou E, Vardaka E, Mouratidou MC, Kyrailidi F, Tzitiridou-Chatzopoulou M, Orovou E, Giartza-Taxidou E, Deretzi G, Grigoriadis N, Doulberis M. Impact of Helicobacter pylori and metabolic syndrome on mast cell activation-related pathophysiology and neurodegeneration. Neurochem Int 2024; 175:105724. [PMID: 38508416 DOI: 10.1016/j.neuint.2024.105724] [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] [Received: 12/08/2023] [Revised: 03/03/2024] [Accepted: 03/17/2024] [Indexed: 03/22/2024]
Abstract
Both Helicobacter pylori (H. pylori) infection and metabolic syndrome (MetS) are highly prevalent worldwide. The emergence of relevant research suggesting a pathogenic linkage between H. pylori infection and MetS-related cardio-cerebrovascular diseases and neurodegenerative disorders, particularly through mechanisms involving brain pericyte deficiency, hyperhomocysteinemia, hyperfibrinogenemia, elevated lipoprotein-a, galectin-3 overexpression, atrial fibrillation, and gut dysbiosis, has raised stimulating questions regarding their pathophysiology and its translational implications for clinicians. An additional stimulating aspect refers to H. pylori and MetS-related activation of innate immune cells, mast cells (MC), which is an important, often early, event in systemic inflammatory pathologies and related brain disorders. Synoptically, MC degranulation may play a role in the pathogenesis of H. pylori and MetS-related obesity, adipokine effects, dyslipidemia, diabetes mellitus, insulin resistance, arterial hypertension, vascular dysfunction and arterial stiffness, an early indicator of atherosclerosis associated with cardio-cerebrovascular and neurodegenerative disorders. Meningeal MC can be activated by triggers including stress and toxins resulting in vascular changes and neurodegeneration. Likewise, H.pylori and MetS-related MC activation is linked with: (a) vasculitis and thromboembolic events that increase the risk of cardio-cerebrovascular and neurodegenerative disorders, and (b) gut dysbiosis-associated neurodegeneration, whereas modulation of gut microbiota and MC activation may promote neuroprotection. This narrative review investigates the intricate relationship between H. pylori infection, MetS, MC activation, and their collective impact on pathophysiological processes linked to neurodegeneration. Through a comprehensive search of current literature, we elucidate the mechanisms through which H. pylori and MetS contribute to MC activation, subsequently triggering cascades of inflammatory responses. This highlights the role of MC as key mediators in the pathogenesis of cardio-cerebrovascular and neurodegenerative disorders, emphasizing their involvement in neuroinflammation, vascular dysfunction and, ultimately, neuronal damage. Although further research is warranted, we provide a novel perspective on the pathophysiology and management of brain disorders by exploring potential therapeutic strategies targeting H. pylori eradication, MetS management, and modulation of MC to mitigate neurodegeneration risk while promoting neuroprotection.
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Affiliation(s)
- Jannis Kountouras
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece.
| | - Marina Boziki
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Evangelos Kazakos
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; School of Healthcare Sciences, Midwifery Department, University of West Macedonia, Koila, Kozani, 50100, Macedonia, Greece
| | - Paschalis Theotokis
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Evangelia Kesidou
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Maria Nella
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Christos Bakirtzis
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Eleni Karafoulidou
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Elisabeth Vardaka
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; Department of Nutritional Sciences and Dietetics, School of Health Sciences, International Hellenic University, Alexander Campus, 57400, Macedonia, Greece
| | - Maria C Mouratidou
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece
| | - Foteini Kyrailidi
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece
| | - Maria Tzitiridou-Chatzopoulou
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; School of Healthcare Sciences, Midwifery Department, University of West Macedonia, Koila, Kozani, 50100, Macedonia, Greece
| | - Eirini Orovou
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; School of Healthcare Sciences, Midwifery Department, University of West Macedonia, Koila, Kozani, 50100, Macedonia, Greece
| | - Evaggelia Giartza-Taxidou
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece
| | - Georgia Deretzi
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; Department of Neurology, Papageorgiou General Hospital, Thessaloniki, Macedonia, Greece
| | - Nikolaos Grigoriadis
- Laboratory of Experimental Neurology and Neuroimmunology and the Multiple Sclerosis Center, 2nd Department of Neurology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Michael Doulberis
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, 54642, Thessaloniki, Macedonia, Greece; Gastroklinik, Private Gastroenterological Practice, 8810, Horgen, Switzerland; Division of Gastroenterology and Hepatology, Medical University Department, Kantonsspital Aarau, 5001, Aarau, Switzerland
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Tzitiridou-Chatzopoulou M, Kazakos E, Orovou E, Andronikidi PE, Kyrailidi F, Mouratidou MC, Iatrakis G, Kountouras J. The Role of Helicobacter pylori and Metabolic Syndrome-Related Mast Cell Activation Pathologies and Their Potential Impact on Pregnancy and Neonatal Outcomes. J Clin Med 2024; 13:2360. [PMID: 38673633 PMCID: PMC11050948 DOI: 10.3390/jcm13082360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/08/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Helicobacter pylori infection, a significant global burden beyond the gastrointestinal tract, has long been implicated in various systemic pathologies. Rising evidence suggests that the bacterium's intricate relationship with the immune system and its potential to induce chronic inflammation impact diverse pathophysiological processes in pregnant women that may in turn affect the incidence of several adverse pregnancy and neonate outcomes. Helicobacter pylori infection, which has been linked to metabolic syndrome and other disorders by provoking pericyte dysfunction, hyperhomocysteinemia, galectin-3, atrial fibrillation, gut dysbiosis, and mast cell activation pathologies, may also contribute to adverse pregnancy and neonatal outcomes. Together with increasing our biological understanding of the individual and collective involvement of Helicobacter pylori infection-related metabolic syndrome and concurrent activation of mast cells in maternal, fetus, and neonatal health outcomes, the present narrative review may foster related research endeavors to offer novel therapeutic approaches and informed clinical practice interventions to mitigate relevant risks of this critical topic among pregnant women and their offspring.
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Affiliation(s)
- Maria Tzitiridou-Chatzopoulou
- School of Health Sciences, Department of Midwifery, University of Western Macedonia, 50100 Koila, Greece; (M.T.-C.); (E.K.); (E.O.)
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Macedonia, 54642 Thessaloniki, Greece; (F.K.); (M.C.M.)
| | - Evangelos Kazakos
- School of Health Sciences, Department of Midwifery, University of Western Macedonia, 50100 Koila, Greece; (M.T.-C.); (E.K.); (E.O.)
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Macedonia, 54642 Thessaloniki, Greece; (F.K.); (M.C.M.)
| | - Eirini Orovou
- School of Health Sciences, Department of Midwifery, University of Western Macedonia, 50100 Koila, Greece; (M.T.-C.); (E.K.); (E.O.)
| | - Paraskevi Eva Andronikidi
- Department of Nephrology, Aretaieion University Hospital, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece;
| | - Foteini Kyrailidi
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Macedonia, 54642 Thessaloniki, Greece; (F.K.); (M.C.M.)
| | - Maria C. Mouratidou
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Macedonia, 54642 Thessaloniki, Greece; (F.K.); (M.C.M.)
| | - Georgios Iatrakis
- Department of Midwifery, University of West Attica, 12243 Athens, Greece;
| | - Jannis Kountouras
- Second Medical Clinic, School of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Macedonia, 54642 Thessaloniki, Greece; (F.K.); (M.C.M.)
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Toward to Explain of Working Principles of Blood-Brain Barriers Like X-Ray Devices: A Neurophysical Hypothesis. JOURNAL OF CONTEMPORARY MEDICINE 2023. [DOI: 10.16899/jcm.1203348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Objective: The blood-brain barrier is an electromagnetic mechanism on a neurophysical basis. In this study, we compared the X-Ray device, which is similar to the blood-brain barrier in many ways.
Material and Methods: We collected brain samples from deep temporal cortex sections of ten rats, stained them via the glial fibrillary acidic protein (GFAP) technique, visualized the architectural structures of the blood-brain barriers, and compared them with X-ray devices.
Results: With the arterioles forming the tube blood-brain barrier in the X-ray device, the anode-cathode that provides the electric current and determines the direction of the current flow corresponds to the astrocytes surrounding the anode-cathode vessel, the cooling system to the cerebrospinal fluid circulating the vessel, and the electrons emitted from the cathode to the particles flowing in the vessel.
Conclusion: With the architecture presented by the blood-brain barrier, we envision it functioning as an X-Ray and optical reader that display objects in passenger baggage and direct them according to barcode numbers.
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Inoue E, Minatozaki S, Katsuta Y, Nonaka S, Nakanishi H. Human β-Defensin 3 Inhibits Porphyromonas Gingivalis Lipopolysaccharide-Induced Oxidative and Inflammatory Responses of Microglia by Suppression of Cathepsins B and L. Int J Mol Sci 2022; 23:ijms232315099. [PMID: 36499428 PMCID: PMC9738813 DOI: 10.3390/ijms232315099] [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: 10/25/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
Recently, the effects of antibacterial peptides are suggested to have therapeutic potential in Alzheimer's disease. Furthermore, systemic treatment of Porphyromonas gingivalis (Pg) lipopolysaccharide (LPS) induced Alzheimer's disease-like neuropathological changes in middle-aged mice. Then, we examined whether human β-defensins (hBDs), antimicrobial peptides produced by the oral mucosa and salivary glands, can suppress Pg LPS-induced oxidative and inflammatory responses by microglia. hBD3 (1 μM) significantly suppressed Pg LPS-induced production of nitric oxide and interleukin-6 (IL-6) by MG6 cells, a mouse microglial cell line. hBD3 (1 μM) also significantly inhibited Pg LPS-induced expression of IL-6 by HMC3 cells, a human microglial cell line. In contrast, neither hBD1, hBD2 nor hBD4 failed to inhibit their productions. Furthermore, hBD3 suppressed Pg LPS-induced p65 nuclear translocation through the IκBα degradation. Pg LPS-induced expression of IL-6 was significantly suppressed by E64d, a cysteine protease inhibitor, and CA-074Me, a known specific inhibitor for cathepsin B, but not by pepstatin A, an aspartic protease inhibitor. Interestingly, hBD3 significantly inhibited enzymatic activities of recombinant human cathepsins B and L, lysosomal cysteine proteases, and their intracellular activities in MG6 cells. Therefore, hBD3 suppressed oxidative and inflammatory responses of microglia through the inhibition of cathepsins B and L, which enzymatic activities are necessary for the NF-κB activation.
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Affiliation(s)
- Erika Inoue
- Faculty of Pharmacy, Yasuda Women’s University, Hiroshima 731-0153, Japan
| | - Shiyo Minatozaki
- Faculty of Pharmacy, Yasuda Women’s University, Hiroshima 731-0153, Japan
| | - Yui Katsuta
- Faculty of Pharmacy, Yasuda Women’s University, Hiroshima 731-0153, Japan
| | - Saori Nonaka
- Department of Pharmacology, Faculty of Pharmacy, Yasuda Women’s University, Hiroshima 731-0153, Japan
| | - Hiroshi Nakanishi
- Department of Pharmacology, Faculty of Pharmacy, Yasuda Women’s University, Hiroshima 731-0153, Japan
- Correspondence:
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Bruno F, Malvaso A, Canterini S, Bruni AC. Antimicrobial Peptides (AMPs) in the Pathogenesis of Alzheimer’s Disease: Implications for Diagnosis and Treatment. Antibiotics (Basel) 2022; 11:antibiotics11060726. [PMID: 35740133 PMCID: PMC9220182 DOI: 10.3390/antibiotics11060726] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 05/25/2022] [Accepted: 05/26/2022] [Indexed: 02/04/2023] Open
Abstract
Alzheimer’s disease (AD) represents the most frequent type of dementia in elderly people. There are two major forms of the disease: sporadic (SAD)—whose causes are not completely understood—and familial (FAD)—with clear autosomal dominant inheritance. The two main hallmarks of AD are extracellular deposits of amyloid-beta (Aβ) peptide and intracellular deposits of the hyperphosphorylated form of the tau protein (P-tau). An ever-growing body of research supports the infectious hypothesis of sporadic forms of AD. Indeed, it has been documented that some pathogens, such as herpesviruses and certain bacterial species, are commonly present in AD patients, prompting recent clinical research to focus on the characterization of antimicrobial peptides (AMPs) in this pathology. The literature also demonstrates that Aβ can be considered itself as an AMP; thus, representing a type of innate immune defense peptide that protects the host against a variety of pathogens. Beyond Aβ, other proteins with antimicrobial activity, such as lactoferrin, defensins, cystatins, thymosin β4, LL37, histatin 1, and statherin have been shown to be involved in AD. Here, we summarized and discussed these findings and explored the diagnostic and therapeutic potential of AMPs in AD.
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Affiliation(s)
- Francesco Bruno
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, 88046 Lamezia Terme, Italy
- Association for Neurogenetic Research (ARN), 88046 Lamezia Terme, Italy;
- Correspondence:
| | - Antonio Malvaso
- Neurology Unit, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy;
| | - Sonia Canterini
- Division of Neuroscience, Department of Psychology, University La Sapienza, 00158 Rome, Italy;
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Associations among Cognitive Functions, Plasma DNA, and Diffusion Tensor Image along the Perivascular Space (DTI-ALPS) in Patients with Parkinson's Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:4034509. [PMID: 33680283 PMCID: PMC7904342 DOI: 10.1155/2021/4034509] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 01/30/2021] [Indexed: 01/24/2023]
Abstract
Background Parkinson's disease (PD) is a common neurodegenerative disease associated with accumulation of misfolding proteins and increased neuroinflammation, which may further impair the glymphatic system. The purpose of this study was to utilize diffusion tensor image analysis along the perivascular space (DTI-ALPS) to evaluate glymphatic system activity and its relationship with systemic oxidative stress status in PD patients. Methods Magnetic resonance imaging and neuropsychological tests were conducted on 25 PD patients with normal cognition (PDN), 25 PD patients with mild cognitive impairment (PD-MCI), 38 PD patients with dementia (PDD), and 47 normal controls (NC). Oxidative stress status was assessed by plasma DNA level. Differences in ALPS-index among the subgroups were assessed and further correlated with cognitive functions and plasma DNA levels. Results The PD-MCI and PDD groups showed significantly lower ALPS-index compared to normal controls. The ALPS-index was inversely correlated with plasma nuclear DNA, mitochondrial DNA levels, and cognitive scores. Conclusions Lower diffusivity along the perivascular space, represented by lower ALPS-index, indicates impairment of the glymphatic system in PD patients. The correlation between elevated plasma nuclear DNA levels and lower ALPS-index supports the notion that PD patients may exhibit increased oxidative stress associated with glymphatic system microstructural alterations.
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Verheggen ICM, de Jong JJA, van Boxtel MPJ, Postma AA, Jansen JFA, Verhey FRJ, Backes WH. Imaging the role of blood-brain barrier disruption in normal cognitive ageing. GeroScience 2020; 42:1751-1764. [PMID: 33025410 PMCID: PMC7732959 DOI: 10.1007/s11357-020-00282-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 09/28/2020] [Indexed: 12/11/2022] Open
Abstract
To investigate whether blood-brain barrier (BBB) disruption is a potential mechanism of usual age-related cognitive decline, we conducted dynamic contrast-enhanced (DCE) MRI to measure BBB leakage in a healthy sample, and investigated the association with longitudinal cognitive decline. In a sample of neurologically and cognitively healthy, older individuals, BBB leakage rate in the white and grey matter and hippocampus was measured using DCE MRI with pharmacokinetic modelling. Regression analysis was performed to investigate whether the leakage rate was associated with decline in cognitive performance (memory encoding, memory retrieval, executive functioning and processing speed) over 12 years. White and grey matter BBB leakages were significantly associated with decline in memory retrieval. No significant relations were found between hippocampal BBB leakage and cognitive performance. BBB disruption already being associated with usual cognitive ageing, supports that this neurovascular alteration is a possible explanation for the cognitive decline inherent to the ageing process. More insight into BBB leakage during the normal ageing process could improve estimation and interpretation of leakage rate in pathological conditions. The current results might also stimulate the search for strategies to maintain BBB integrity and help increase the proportion people experiencing successful ageing. Netherlands Trial Register number: NL6358, date of registration: 2017-03-24.
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Affiliation(s)
- Inge C M Verheggen
- Department of Psychiatry and Neuropsychology, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands.
- Alzheimer Center Limburg, Maastricht, The Netherlands.
| | - Joost J A de Jong
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Martin P J van Boxtel
- Department of Psychiatry and Neuropsychology, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Alzheimer Center Limburg, Maastricht, The Netherlands
| | - Alida A Postma
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Jacobus F A Jansen
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Frans R J Verhey
- Department of Psychiatry and Neuropsychology, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Alzheimer Center Limburg, Maastricht, The Netherlands
| | - Walter H Backes
- School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
- School for Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
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Alarmins and c-Jun N-Terminal Kinase (JNK) Signaling in Neuroinflammation. Cells 2020; 9:cells9112350. [PMID: 33114371 PMCID: PMC7693759 DOI: 10.3390/cells9112350] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/08/2020] [Accepted: 10/21/2020] [Indexed: 02/07/2023] Open
Abstract
Neuroinflammation is involved in the progression or secondary injury of multiple brain conditions, including stroke and neurodegenerative diseases. Alarmins, also known as damage-associated molecular patterns, are released in the presence of neuroinflammation and in the acute phase of ischemia. Defensins, cathelicidin, high-mobility group box protein 1, S100 proteins, heat shock proteins, nucleic acids, histones, nucleosomes, and monosodium urate microcrystals are thought to be alarmins. They are released from damaged or dying cells and activate the innate immune system by interacting with pattern recognition receptors. Being principal sterile inflammation triggering agents, alarmins are considered biomarkers and therapeutic targets. They are recognized by host cells and prime the innate immune system toward cell death and distress. In stroke, alarmins act as mediators initiating the inflammatory response after the release from the cellular components of the infarct core and penumbra. Increased c-Jun N-terminal kinase (JNK) phosphorylation may be involved in the mechanism of stress-induced release of alarmins. Putative crosstalk between the alarmin-associated pathways and JNK signaling seems to be inherently interwoven. This review outlines the role of alarmins/JNK-signaling in cerebral neurovascular inflammation and summarizes the complex response of cells to alarmins. Emerging anti-JNK and anti-alarmin drug treatment strategies are discussed.
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Tan N, Hu S, Hu Z, Wu Z, Wang B. Quantitative proteomic characterization of microvesicles/exosomes from the cerebrospinal fluid of patients with acute bilirubin encephalopathy. Mol Med Rep 2020; 22:1257-1268. [PMID: 32468033 PMCID: PMC7339682 DOI: 10.3892/mmr.2020.11194] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 05/06/2020] [Indexed: 01/10/2023] Open
Abstract
Severe hyperbilirubinemia causes neurotoxicity and may lead to acute bilirubin encephalopathy (ABE) during the critical period of central nervous system development. The aim of the present study was to identify differentially expressed proteins (DEPs) in microvesicles/exosomes (MV/E) isolated from the cerebrospinal fluid (CSF) of patients with ABE. Co-precipitation was used to isolate the MV/E from the CSF of patients with ABE and age-matched controls. Isobaric tagging for relative and absolute quantification-based proteomic technology combined with liquid chromatography/tandem mass spectrometry was used to identify DEPs in the MV/E. Bioinformatics analysis was subsequently performed to investigate Gene Ontology functional annotation and Kyoto Encyclopedia of Genes and Genomes enriched signaling pathways of these DEPs. A total of four proteins were selected for further validation via western blotting. A total of 291 dysregulated proteins were identified by comparing the patients with ABE with the controls. Bioinformatics analysis indicated the involvement of immune-inflammation-associated cellular processes and signaling pathways in the pathophysiology of ABE. In conclusion, the present study identified the proteomic profile of MV/E isolated from the CSF of patients with ABE. These results may provide an improved understanding of the pathogenesis of ABE and may help to identify early diagnostic biomarkers and therapeutic targets.
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Affiliation(s)
- Ning Tan
- Department of Pediatrics, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Shuiwang Hu
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Zhen Hu
- National and Local Joint Engineering Laboratory for High‑through Molecular Diagnosis Technology, Translational Medicine Institute, Collaborative Research Center for Post‑doctoral Mobile Stations of Central South University, Affiliated The First People's Hospital of Chenzhou, Southern Medical University, University of South China, Chenzhou, Hunan 423000, P.R. China
| | - Zhouli Wu
- Department of Neonatology, Affiliated The First People's Hospital of Chenzhou, Southern Medical University, University of South China, Chenzhou, Hunan 423000, P.R. China
| | - Bin Wang
- Department of Pediatrics, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
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Infections as triggers of flares in systemic autoimmune diseases: novel innate immunity mechanisms. Curr Opin Rheumatol 2020; 31:525-531. [PMID: 31135383 DOI: 10.1097/bor.0000000000000630] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW The innate immune response (IIR) has to be immediate facing pathogens, and effective to induce a long-lasting adaptive immunity and immune memory. In genetically susceptible individuals, beyond a first defense, a chronically activated by infections IIR may represent a trigger for the onset or flares in systemic autoimmune diseases. This article reviews the recent scientific literature in this regard and highlights the key issues needing investigation. RECENT FINDINGS Thanks to its high specificity mediated by pattern recognition receptors, the IIR is not called unspecific anymore. The discovery of these increasingly accurate recognizing molecular mechanisms has also evidenced their involvement in breaking self-immune tolerance and to maintain chronic inflammation in autoimmune responses. Neutrophil extracellular traps (NETS) as the main source of antinuclear antibodies; the 'neutrophils-pDC activation loop' theory; and the Th1/Th2/Th17 misbalances induced by microbial products because of chronically activated innate immune cells, are some of the recent uncovered IIR origins involved in infectious-induced systemic autoimmune diseases. SUMMARY A deeper understanding of the genetic predisposition and the pathogen-derived factors responsible to exacerbate the IIR might potentially provide therapeutic targets to counteract flares in systemic autoimmune diseases. VIDEO ABSTRACT.
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Firinci B, Caglar O, Karadeniz E, Ahiskalioglu A, Demirci T, Aydin MD. Mysterious effects of olfactory pathway lesions on intestinal immunodeficiency targeting Peyer's patches: The first experimental study. Med Hypotheses 2019; 125:31-36. [PMID: 30902148 DOI: 10.1016/j.mehy.2019.02.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/05/2019] [Accepted: 02/09/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Although olfaction has been considered as important neuroimmunomodulatory foundation, there is no satisfying analytical information between neurohistomorphological features olfactory networks and intestinal immune system hardwares. We studied if the olfactory bulb lesions (OBL) may rely on histopathological features of intestinal lymphatic Peyer's patches in an animal model. METHODS Thirty-two rats were grouped as control (Group I, n = 8), SHAM (Group II, n = 7) and OBL (Group III, n = 17) respectively; and followed eight weeks and animals were decapitated. The olfactory bulbs and intestines were extracted. Specimens stained with hematoxylin/eosin and GFAP methods and analyzed Stereologically to evaluate volume loss of olfactory bulbs and Peyer's patches volumes (PV) of intestines per cubic millimeter and compared with each other's statistically. RESULTS The mean olfactory bulbs volumes were estimated as 3.65 ± 0.32/mm3 in group I, 3.12 ± 0.20/mm3 in group II and 2.21 ± 0.15/mm3 in group III (p < 0.0005 Group III vs. I and II). The mean of PV were estimated as; (9 ± 2) × 106 µm3/cm3 in Group-I, (12 ± 3) × 106 µm3/cm3 in Group-II; and (23 ± 4) × 106 µm3/cm3 in group-III (p < 0.005 Group II vs. I, p < 0.0005 Group III vs. I-II). CONCLUSIONS OBL could rely on intestinal immunodeficiency causing by olfaction loss induced denervation injury of Peyer's patches.
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Affiliation(s)
- Binali Firinci
- Ataturk University, Medical Faculty, Department of Pediatric Surgery, Erzurum, Turkey
| | - Ozgur Caglar
- Ataturk University, Medical Faculty, Department of Pediatric Surgery, Erzurum, Turkey
| | - Erdem Karadeniz
- Ataturk University, Medical Faculty, Department of General Surgery, Erzurum, Turkey
| | - Ali Ahiskalioglu
- Ataturk University, Medical Faculty, Department of Anesthesiology and Reanimation, Erzurum, Turkey
| | - Tuba Demirci
- Ataturk University, Medical Faculty, Department of Histology, Erzurum, Turkey
| | - Mehmet Dumlu Aydin
- Ataturk University, Medical Faculty, Department of Neurosurgery, Erzurum, Turkey.
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Kolinko Y, Kralickova M, Tonar Z. The impact of pericytes on the brain and approaches for their morphological analysis. J Chem Neuroanat 2018; 91:35-45. [DOI: 10.1016/j.jchemneu.2018.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/10/2018] [Accepted: 04/15/2018] [Indexed: 12/15/2022]
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Verheggen I, Van Boxtel M, Verhey F, Jansen J, Backes W. Interaction between blood-brain barrier and glymphatic system in solute clearance. Neurosci Biobehav Rev 2018; 90:26-33. [DOI: 10.1016/j.neubiorev.2018.03.028] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 03/22/2018] [Accepted: 03/25/2018] [Indexed: 02/03/2023]
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Immune-cognitive system connectivity reduces bumblebee foraging success in complex multisensory floral environments. Sci Rep 2018; 8:5953. [PMID: 29654316 PMCID: PMC5899130 DOI: 10.1038/s41598-018-24372-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 04/03/2018] [Indexed: 02/07/2023] Open
Abstract
Bumblebees are declining at alarming rate worldwide, posing a significant threat to the function and diversity of temperate ecosystems. These declines have been attributed, in part, to the direct effect of specific pathogens on bumblebee survival. However, pathogens may also have a negative impact on host populations indirectly through immune-induced cognitive deficits in infected individuals. To gain greater insight into mechanisms and potential conservation implications of such 'immune-brain crosstalk' in bumblebees, we non-pathogenetically activated humoral and cellular immune pathways in individuals and then tested for long-term reductions in cognitive performance and foraging proficiency. We show that chronic activation of humoral, but not a cellular, immune pathways and effectors in foragers significantly reduces their ability to flexibly and efficiently harvest resources in multi-sensory floral environments for at least 7 days post-treatment. Humoral defense responses thus have the potential to confer significant foraging costs to bumblebee foragers over timeframes that would negatively impact colony growth and reproductive output under natural conditions. Our findings indicate that fitness effects of immune-brain crosstalk should be considered before attributing wild bumblebee decline to a particular pathogen species.
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Kwiatkowski K, Mika J. The importance of chemokines in neuropathic pain development and opioid analgesic potency. Pharmacol Rep 2018; 70:821-830. [PMID: 30122168 DOI: 10.1016/j.pharep.2018.01.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 01/22/2018] [Indexed: 12/30/2022]
Abstract
The treatment of neuropathic pain resulting from nervous system malfunction remains a challenging problem for doctors and scientists. The lower effectiveness of conventionally used analgesics in neuropathic pain is associated with complex and not fully understood mechanisms of its development. Undoubtedly, interactions between immune and nervous system are crucial for maintenance of painful neuropathy. Nerve injury induces glial cell activation and thus enhances the production of numerous pronociceptive factors by these cells, including interleukins and chemokines. Increased release of those factors reduces the analgesic efficacy of opioids, which is significantly lower in neuropathic pain than in other painful conditions. This review discusses the role of chemokines from all four subfamilies as essential mediators of neuron-glia interactions occurring under neuropathic pain conditions. Based on available data, we analyse the influence of chemokines on opioid properties. Finally, we identify new direct and indirect pharmacological targets whose modulation may result in effective therapy of neuropathic pain, possibly in combination with opioids.
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Affiliation(s)
- Klaudia Kwiatkowski
- Institute of Pharmacology, Polish Academy of Sciences, Department of Pain Pharmacology, Kraków, Poland.
| | - Joanna Mika
- Institute of Pharmacology, Polish Academy of Sciences, Department of Pain Pharmacology, Kraków, Poland.
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Doulberis M, Kotronis G, Thomann R, Polyzos SA, Boziki M, Gialamprinou D, Deretzi G, Katsinelos P, Kountouras J. Review: Impact of Helicobacter pylori on Alzheimer's disease: What do we know so far? Helicobacter 2018; 23. [PMID: 29181894 DOI: 10.1111/hel.12454] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Helicobacter pylori has changed radically gastroenterologic world, offering a new concept in patients' management. Over time, more medical data gave rise to diverse distant, extragastric manifestations and interactions of the "new" discovered bacterium. Special interest appeared within the field of neurodegenerative diseases and particularly Alzheimer's disease, as the latter and Helicobacter pylori infection are associated with a large public health burden and Alzheimer's disease ranks as the leading cause of disability. However, the relationship between Helicobacter pylori infection and Alzheimer's disease remains uncertain. METHODS We performed a narrative review regarding a possible connection between Helicobacter pylori and Alzheimer's disease. All accessible relevant (pre)clinical studies written in English were included. Both affected pathologies were briefly analyzed, and relevant studies are discussed, trying to focus on the possible pathogenetic role of this bacterium in Alzheimer's disease. RESULTS Data stemming from both epidemiologic studies and animal experiments seem to be rather encouraging, tending to confirm the hypothesis that Helicobacter pylori infection might influence the course of Alzheimer's disease pleiotropically. Possible main mechanisms may include the bacterium's access to the brain via the oral-nasal-olfactory pathway or by circulating monocytes (infected with Helicobacter pylori due to defective autophagy) through disrupted blood-brain barrier, thereby possibly triggering neurodegeneration. CONCLUSIONS Current data suggest that Helicobacter pylori infection might influence the pathophysiology of Alzheimer's disease. However, further large-scale randomized controlled trials are mandatory to clarify a possible favorable effect of Helicobacter pylori eradication on Alzheimer's disease pathophysiology, before the recommendation of short-term and cost-effective therapeutic regimens against Helicobacter pylori-related Alzheimer's disease.
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Affiliation(s)
- Michael Doulberis
- Department of Internal Medicine, Bürgerspital Hospital, Solothurn, Switzerland
| | - Georgios Kotronis
- Department of Internal Medicine, Agios Pavlos General Hospital, Thessaloniki, Macedonia, Greece
| | - Robert Thomann
- Department of Internal Medicine, Bürgerspital Hospital, Solothurn, Switzerland
| | - Stergios A Polyzos
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Marina Boziki
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Dimitra Gialamprinou
- Department of Pediatrics, Papageorgiou General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Georgia Deretzi
- Department of Neurology, Papageorgiou General Hospital, Multiple Sclerosis Unit, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Panagiotis Katsinelos
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Jannis Kountouras
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
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