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Gutiérrez Rico E, Joseph P, Noutsos C, Poon K. Hypothalamic and hippocampal transcriptome changes in App NL-G-F mice as a function of metabolic and inflammatory dysfunction. Neuroscience 2024; 554:107-117. [PMID: 39002757 DOI: 10.1016/j.neuroscience.2024.07.007] [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: 08/13/2023] [Revised: 05/20/2024] [Accepted: 07/05/2024] [Indexed: 07/15/2024]
Abstract
The progression of Alzheimer's disease (AD) has a silent phase that predates characteristic cognitive decline and eventually leads to active cognitive deficits. Metabolism, diet, and obesity have been correlated to the development of AD but is poorly understood. The hypothalamus is a brain region that exerts homeostatic control on food intake and metabolism and has been noted to be impacted during the active phase of Alzheimer's disease. This study, in using an amyloid overexpression AppNL-G-F mouse model under normal metabolic conditions, examines blood markers in young and old male AppNL-G-F mice (n = 5) that corresponds to the silent and active phases of AD, and bulk gene expression changes in the hypothalamus and the hippocampus. The results show a large panel of inflammatory mediators, leptin, and other proteins that may be involved in weakening the blood brain barrier, to be increased in the young AppNL-G-F mice but not in the old AppNL-G-F mice. There were also several differentially expressed genes in both the hypothalamus and the hippocampus in the young AppNL-G-F mice prior to amyloid plaque formation and cognitive decline that persisted in the old AppNL-G-F mice, including GABRa2 receptor, Wdfy1, and several pseudogenes with unknown function. These results suggests that a larger panel of inflammatory mediators may be used as blood markers to detect silent AD, and that a change in leptin and gene expression in the hypothalamus exist prior to cognitive effects, suggesting a coupling of metabolism with amyloid plaque induced cognitive decline.
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Affiliation(s)
- Evelyn Gutiérrez Rico
- Tohoku University, Graduate School of Pharmaceutical Sciences, Sendai 980-8578, Japan
| | - Patricia Joseph
- SUNY Old Westbury, 223 Store Hill Rd, Old Westbury, NY 11568, USA
| | - Christos Noutsos
- SUNY Old Westbury, 223 Store Hill Rd, Old Westbury, NY 11568, USA
| | - Kinning Poon
- SUNY Old Westbury, 223 Store Hill Rd, Old Westbury, NY 11568, USA.
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2
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Naik B, Sasikumar J, Das SP. From Skin and Gut to the Brain: The Infectious Journey of the Human Commensal Fungus Malassezia and Its Neurological Consequences. Mol Neurobiol 2024:10.1007/s12035-024-04270-w. [PMID: 38871941 DOI: 10.1007/s12035-024-04270-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 05/27/2024] [Indexed: 06/15/2024]
Abstract
The human mycobiome encompasses diverse communities of fungal organisms residing within the body and has emerged as a critical player in shaping health and disease. While extensive research has focused on the skin and gut mycobiome, recent investigations have pointed toward the potential role of fungal organisms in neurological disorders. Among those fungal organisms, the presence of the commensal fungus Malassezia in the brain has created curiosity because of its commensal nature and primary association with the human skin and gut. This budding yeast is responsible for several diseases, such as Seborrheic dermatitis, Atopic dermatitis, Pityriasis versicolor, Malassezia folliculitis, dandruff, and others. However recent findings surprisingly show the presence of Malassezia DNA in the brain and have been linked to diseases like Alzheimer's disease, Parkinson's disease, Multiple sclerosis, and Amyotrophic lateral sclerosis. The exact role of Malassezia in these disorders is unknown, but its ability to infect human cells, travel through the bloodstream, cross the blood-brain barrier, and reside along with the lipid-rich neuronal cells are potential mechanisms responsible for pathogenesis. This also includes the induction of pro-inflammatory cytokines, disruption of the blood-brain barrier, gut-microbe interaction, and accumulation of metabolic changes in the brain environment. In this review, we discuss these key findings from studies linking Malassezia to neurological disorders, emphasizing the complex and multifaceted nature of these cases. Furthermore, we discuss potential mechanisms through which Malassezia might contribute to the development of neurological conditions. Future investigations will open up new avenues for our understanding of the fungal gut-brain axis and how it influences human behavior. Collaborative research efforts among microbiologists, neuroscientists, immunologists, and clinicians hold promise for unraveling the enigmatic connections between human commensal Malassezia and neurological disorders.
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Affiliation(s)
- Bharati Naik
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Jayaprakash Sasikumar
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Shankar Prasad Das
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India.
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3
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Sarb OF, Sarb AD, Iacobescu M, Vlad IM, Milaciu MV, Ciurmarnean L, Vacaras V, Tantau AI. From Gut to Brain: Uncovering Potential Serum Biomarkers Connecting Inflammatory Bowel Diseases to Neurodegenerative Diseases. Int J Mol Sci 2024; 25:5676. [PMID: 38891863 PMCID: PMC11171869 DOI: 10.3390/ijms25115676] [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: 03/29/2024] [Revised: 05/12/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024] Open
Abstract
Inflammatory bowel diseases (IBDs) are characterized by chronic gastrointestinal inflammation due to abnormal immune responses to gut microflora. The gut-brain axis is disrupted in IBDs, leading to neurobiological imbalances and affective symptoms. Systemic inflammation in IBDs affects the brain's inflammatory response system, hormonal axis, and blood-brain barrier integrity, influencing the gut microbiota. This review aims to explore the association between dysregulations in the gut-brain axis, serum biomarkers, and the development of cognitive disorders. Studies suggest a potential association between IBDs and the development of neurodegeneration. The mechanisms include systemic inflammation, nutritional deficiency, GBA dysfunction, and the effect of genetics and comorbidities. The objective is to identify potential correlations and propose future research directions to understand the impact of altered microbiomes and intestinal barrier functions on neurodegeneration. Serum levels of vitamins, inflammatory and neuronal damage biomarkers, and neuronal growth factors have been investigated for their potential to predict the development of neurodegenerative diseases, but current results are inconclusive and require more studies.
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Affiliation(s)
- Oliviu-Florentiu Sarb
- Department of Neuroscience, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (O.-F.S.); (I.-M.V.)
- Department of Internal Medicine, 4th Medical Clinic, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.-V.M.); (L.C.); (A.-I.T.)
| | - Adriana-Daniela Sarb
- Department of Internal Medicine, Heart Institute, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Maria Iacobescu
- Department of Proteomics and Metabolomics, MEDFUTURE Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Irina-Maria Vlad
- Department of Neuroscience, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (O.-F.S.); (I.-M.V.)
| | - Mircea-Vasile Milaciu
- Department of Internal Medicine, 4th Medical Clinic, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.-V.M.); (L.C.); (A.-I.T.)
| | - Lorena Ciurmarnean
- Department of Internal Medicine, 4th Medical Clinic, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.-V.M.); (L.C.); (A.-I.T.)
| | - Vitalie Vacaras
- Department of Neuroscience, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (O.-F.S.); (I.-M.V.)
| | - Alina-Ioana Tantau
- Department of Internal Medicine, 4th Medical Clinic, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.-V.M.); (L.C.); (A.-I.T.)
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4
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Gong B, Li M, Wang Z, Hao G, Sun L, Zhang J, Yuan L. Integrated analysis of circRNA- related ceRNA network targeting neuroinflammation in medial temporal lobe epilepsy. Brain Res Bull 2024; 209:110908. [PMID: 38402995 DOI: 10.1016/j.brainresbull.2024.110908] [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: 08/21/2023] [Revised: 02/04/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND medial temporal lobe epilepsy (mTLE) is among the most common types of temporal lobe epilepsy (TLE) ,it is generally resistant to drug treatment, which significantly impacts the quality of life and treatment. Research on novel therapeutic approaches for mTLE has become a current focus. Our study aims to construct and analyze a competing endogenous RNA (ceRNA) network that targets neuroinflammation using publicly available data, which may offer a novel therapeutic approach for mTLE. METHODS we utilized the R package to analyze GSE186334 downloaded from Gene Expression Omnibus database, subsequently constructing and identifying hub network within the ceRNA network using public databases. Lastly, we validated the expressions and interactions of some nodes within the hub ceRNA network in Sombati cell model. RESULTS our transcriptome analysis identified 649 differentially expressed (DE) mRNAs (273 up-regulated, 376 down-regulated) and 36 DE circRNAs (11 up-regulated, 25 down-regulated) among mTLE patients. A total of 23 candidate DE mRNAs associated with neuroinflammation were screened, and two ceRNA networks were constructed. A hub network was further screened which included 3 mRNAs, 22 miRNAs, and 11 circRNAs. Finally, we confirmed the hsa-miR-149-5p is crucial in the regulatory effect of hsa_circ_0005145 on IL - 1α in the hub network. CONCLUSIONS In summary, our study identified a hub ceRNA network and validated a potential circRNA-miRNA-mRNA axis targeting neuroinflammation. The results of our research may serve as a potential therapeutic target for mTLE.
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Affiliation(s)
- Bingzheng Gong
- The Second Affiliated Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Mian Li
- Biomedical Sciences College & Shandong Medicinal Biotechnology Centre, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Ziru Wang
- School of Clinical Medicine and Basic Medical Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Gulingyue Hao
- School of Clinical Medicine and Basic Medical Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Liang Sun
- College of Artificial Intelligence and Big Data for Medical Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China.
| | - Jingjun Zhang
- School of Clinical Medicine and Basic Medical Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China.
| | - Liangjie Yuan
- School of Clinical Medicine and Basic Medical Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China.
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Furman S, Green K, Lane TE. COVID-19 and the impact on Alzheimer's disease pathology. J Neurochem 2023:10.1111/jnc.15985. [PMID: 37850241 PMCID: PMC11024062 DOI: 10.1111/jnc.15985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/17/2023] [Accepted: 09/20/2023] [Indexed: 10/19/2023]
Abstract
Coronavirus disease 2019 (COVID-19) has rapidly escalated into a global pandemic that primarily affects older and immunocompromised individuals due to underlying clinical conditions and suppressed immune responses. Furthermore, COVID-19 patients exhibit a spectrum of neurological symptoms, indicating that COVID-19 can affect the brain in a variety of manners. Many studies, past and recent, suggest a connection between viral infections and an increased risk of neurodegeneration, raising concerns about the neurological effects of COVID-19 and the possibility that it may contribute to Alzheimer's disease (AD) onset or worsen already existing AD pathology through inflammatory processes given that both COVID-19 and AD share pathological features and risk factors. This leads us to question whether COVID-19 is a risk factor for AD and how these two conditions might influence each other. Considering the extensive reach of the COVID-19 pandemic and the devastating impact of the ongoing AD pandemic, their combined effects could have significant public health consequences worldwide.
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Affiliation(s)
- Susana Furman
- Department of Neurobiology & Behavior, School of Biological Sciences, University of California, Irvine 92697
| | - Kim Green
- Department of Neurobiology & Behavior, School of Biological Sciences, University of California, Irvine 92697
| | - Thomas E. Lane
- Department of Neurobiology & Behavior, School of Biological Sciences, University of California, Irvine 92697
- Department of Molecular Biology & Biochemistry, School of Biological Sciences, University of California, Irvine 92697, USA
- Center for Virus Research, University of California, Irvine 92697, USA
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Madetko-Alster N, Otto-Ślusarczyk D, Wiercińska-Drapało A, Koziorowski D, Szlufik S, Samborska-Ćwik J, Struga M, Friedman A, Alster P. Clinical Phenotypes of Progressive Supranuclear Palsy-The Differences in Interleukin Patterns. Int J Mol Sci 2023; 24:15135. [PMID: 37894815 PMCID: PMC10606588 DOI: 10.3390/ijms242015135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/08/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
Progressive supranuclear palsy (PSP) is an atypical parkinsonian syndrome based on tau pathology; its clinical phenotype differs, but PSP with Richardson's syndrome (PSP-RS) and the PSP parkinsonism predominant (PSP-P) variant remain the two most common manifestations. Neuroinflammation is involved in the course of the disease and may cause neurodegeneration. However, an up-to-date cytokine profile has not been assessed in different PSP phenotypes. This study aimed to evaluate possible differences in neuroinflammatory patterns between the two most common PSP phenotypes. Serum and cerebrospinal fluid (CSF) concentrations of interleukin-1 beta (IL-1β) and IL-6 were analyzed using enzyme-linked immunosorbent assay (ELISA) kits in 36 study participants-12 healthy controls and 24 patients with a clinical diagnosis of PSP-12 PSP-RS and 12 PSP-P. Disease duration among PSP patients ranged from three to six years. All participants underwent basic biochemical testing, and neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) values were calculated. Due to a lack of neuropathological examinations, as all patients remain alive, total tau levels were assessed in the CSF. Tau levels were significantly higher in the PSP-P and PSP-RS groups compared to the healthy controls. The lowest concentrations of serum and CSF interleukins were observed in PSP-RS patients, whereas PSP-P patients and healthy controls had significantly higher interleukin concentrations. Furthermore, there was a significant correlation between serum IL-6 levels and PLR in PSP-RS patients. The results indicate the existence of distinct neuroinflammatory patterns or a neuroprotective role of increased inflammatory activity, which could cause the differences between PSPS phenotypes and clinical course. The causality of the correlations described requires further studies to be confirmed.
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Affiliation(s)
- Natalia Madetko-Alster
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
| | - Dagmara Otto-Ślusarczyk
- Department of Biochemistry, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland; (D.O.-Ś.); (M.S.)
| | - Alicja Wiercińska-Drapało
- Department of Infectious and Tropical Diseases and Hepatology, Medical University of Warsaw, Wolska 37, 01-201 Warsaw, Poland;
| | - Dariusz Koziorowski
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
| | - Stanisław Szlufik
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
| | - Joanna Samborska-Ćwik
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
| | - Marta Struga
- Department of Biochemistry, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland; (D.O.-Ś.); (M.S.)
| | - Andrzej Friedman
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
| | - Piotr Alster
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (D.K.); (S.S.); (J.S.-Ć.); (A.F.); (P.A.)
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7
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Cosarderelioglu C, Kreimer S, Plaza‐Rodriguez AI, Iglesias PA, Talbot CC, Siragy HM, Carey RM, Ubaida‐Mohien C, O'Rourke B, Ferrucci L, Bennett DA, Walston J, Abadir P. Decoding Angiotensin Receptors: TOMAHAQ-Based Detection and Quantification of Angiotensin Type-1 and Type-2 Receptors. J Am Heart Assoc 2023; 12:e030791. [PMID: 37681524 PMCID: PMC10547273 DOI: 10.1161/jaha.123.030791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/20/2023] [Indexed: 09/09/2023]
Abstract
Background The renin-angiotensin system plays a crucial role in human physiology, and its main hormone, angiotensin, activates 2 G-protein-coupled receptors, the angiotensin type-1 and type-2 receptors, in almost every organ. However, controversy exists about the location, distribution, and expression levels of these receptors. Concerns have been raised over the low sensitivity, low specificity, and large variability between lots of commercially available antibodies for angiotensin type-1 and type-2 receptors, which makes it difficult to reconciliate results of different studies. Here, we describe the first non-antibody-based sensitive and specific targeted quantitative mass spectrometry assay for angiotensin receptors. Methods and Results Using a technique that allows targeted analysis of multiple peptides across multiple samples in a single mass spectrometry analysis, known as TOMAHAQ (triggered by offset, multiplexed, accurate mass, high resolution, and absolute quantification), we have identified and validated specific human tryptic peptides that permit identification and quantification of angiotensin type-1 and type-2 receptors in biological samples. Several peptide sequences are conserved in rodents, making these mass spectrometry assays amenable to both preclinical and clinical studies. We have used this method to quantify angiotensin type-1 and type-2 receptors in postmortem frontal cortex samples of older adults (n=28) with Alzheimer dementia. We correlated levels of angiotensin receptors to biomarkers classically linked to renin-angiotensin system activation, including oxidative stress, inflammation, amyloid-β load, and paired helical filament-tau tangle burden. Conclusions These robust high-throughput assays will not only catalyze novel mechanistic studies in the angiotensin research field but may also help to identify patients with an unbalanced angiotensin receptor distribution who would benefit from angiotensin receptor blocker treatment.
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Affiliation(s)
- Caglar Cosarderelioglu
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
- Division of Geriatrics, Department of Internal MedicineAnkara University School of MedicineAnkaraTurkey
| | - Simion Kreimer
- The Mass Spectrometry and Proteomics FacilityJohns Hopkins University School of MedicineBaltimoreMD
| | | | - Pablo A. Iglesias
- Department of Electrical and Computer Engineering, Whiting School of EngineeringJohns Hopkins UniversityBaltimoreMD
| | - C. Conover Talbot
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of MedicineBaltimoreMD
| | - Helmy M. Siragy
- Division of Endocrinology and Metabolism, Department of MedicineUniversity of VirginiaCharlottesvilleVA
| | - Robert M. Carey
- Division of Endocrinology and Metabolism, Department of MedicineUniversity of VirginiaCharlottesvilleVA
| | | | - Brian O'Rourke
- Division of Cardiology, Department of MedicineJohns Hopkins UniversityBaltimoreMD
| | - Luigi Ferrucci
- National Institute on Aging, National Institutes of HealthBaltimoreMD
| | - David A. Bennett
- Rush Alzheimer’s Disease CenterRush University Medical CenterChicagoIL
| | - Jeremy Walston
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
| | - Peter Abadir
- Division of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMD
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Golzari-Sorkheh M, Weaver DF, Reed MA. COVID-19 as a Risk Factor for Alzheimer's Disease. J Alzheimers Dis 2023; 91:1-23. [PMID: 36314211 DOI: 10.3233/jad-220800] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Severe acute respiratory disease coronavirus 2 (SARS-CoV-2) is responsible for the coronavirus disease 2019 (COVID-19) pandemic. Although a primarily respiratory disease, recent reports indicate that it also affects the central nervous system (CNS). Over 25% of COVID-19 patients report neurological symptoms such as memory loss, anosmia, hyposmia, confusion, and headaches. The neurological outcomes may be a result of viral entry into the CNS and/or resulting neuroinflammation, both of which underlie an elevated risk for Alzheimer's disease (AD). Herein, we ask: Is COVID-19 a risk factor for AD? To answer, we identify the literature and review mechanisms by which COVID-19-mediated neuroinflammation can contribute to the development of AD, evaluate the effects of acute versus chronic phases of infection, and lastly, discuss potential therapeutics to address the rising rates of COVID-19 neurological sequelae.
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Affiliation(s)
| | - Donald F Weaver
- Krembil Research Institute, University Health Network, Toronto, ON, Canada.,Department of Chemistry, University of Toronto, Toronto, ON, Canada.,Department of Pharmaceutical Chemistry, University of Toronto, Toronto, ON, Canada
| | - Mark A Reed
- Krembil Research Institute, University Health Network, Toronto, ON, Canada.,Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
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9
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Wei W, Wang S, Xu C, Zhou X, Lian X, He L, Li K. Gut microbiota, pathogenic proteins and neurodegenerative diseases. Front Microbiol 2022; 13:959856. [PMID: 36466655 PMCID: PMC9715766 DOI: 10.3389/fmicb.2022.959856] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/07/2022] [Indexed: 12/20/2023] Open
Abstract
As the world's population ages, neurodegenerative diseases (NDs) have brought a great burden to the world. However, effective treatment measures have not been found to alleviate the occurrence and development of NDs. Abnormal accumulation of pathogenic proteins is an important cause of NDs. Therefore, effective inhibition of the accumulation of pathogenic proteins has become a priority. As the second brain of human, the gut plays an important role in regulate emotion and cognition functions. Recent studies have reported that the disturbance of gut microbiota (GM) is closely related to accumulation of pathogenic proteins in NDs. On the one hand, pathogenic proteins directly produced by GM are transmitted from the gut to the central center via vagus nerve. On the other hand, The harmful substances produced by GM enter the peripheral circulation through intestinal barrier and cause inflammation, or cross the blood-brain barrier into the central center to cause inflammation, and cytokines produced by the central center cause the production of pathogenic proteins. These pathogenic proteins can produced by the above two aspects can cause the activation of central microglia and further lead to NDs development. In addition, certain GM and metabolites have been shown to have neuroprotective effects. Therefore, modulating GM may be a potential clinical therapeutic approach for NDs. In this review, we summarized the possible mechanism of NDs caused by abnormal accumulation of pathogenic proteins mediated by GM to induce the activation of central microglia, cause central inflammation and explore the therapeutic potential of dietary therapy and fecal microbiota transplantation (FMT) in NDs.
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Affiliation(s)
- Wei Wei
- The Mental Hospital of Yunnan Province, Mental Health Center Affiliated to Kunming Medical University, Kunming, China
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Shixu Wang
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Chongchong Xu
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Xuemei Zhou
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Xinqing Lian
- School of Forensic Medicine, Kunming Medical University, Kunming, China
| | - Lin He
- The Mental Hospital of Yunnan Province, Mental Health Center Affiliated to Kunming Medical University, Kunming, China
| | - Kuan Li
- School of Forensic Medicine, Kunming Medical University, Kunming, China
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10
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Juárez-Cedillo T, Martínez-Rodríguez N, Vargas-Alarcon G, Juárez-Cedillo E, Valle-Medina A, Garrido-Acosta O, Ramirez A. Synergistic influence of cytokine gene polymorphisms over the risk of dementia: A multifactor dimensionality reduction analysis. Front Aging Neurosci 2022; 14:952173. [PMID: 36389080 PMCID: PMC9643855 DOI: 10.3389/fnagi.2022.952173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 10/03/2022] [Indexed: 09/11/2023] Open
Abstract
OBJECTIVE Evidence supports the important role of neuroinflammation in some types of dementia. This study aimed to evaluate the effect of epistasis of gene cytokines such as interleukin (IL)-α, IL-6, tumor necrosis factor (TNFα), and interferon-gamma (IFN-γ) on the susceptibility to the development of dementia. MATERIALS AND METHODS In the study, 221 patients diagnosed with dementia and 710 controls were included. The multifactor-dimensionality reduction (MDR) analysis was performed to identify the epistasis between SNP located in genes of IL-α (rs1800587), IL-6 (rs1800796), TNFα (rs361525 and rs1800629), and IFNγ (rs2069705). The best risk prediction model was identified based on precision and cross-validation consistency. RESULTS Multifactor-dimensionality reduction analysis detected a significant model with the genes TNFα, IFNγ, IL1α, and IL6 (prediction success: 72%, p < 0.0001). When risk factors were analyzed with these polymorphisms, the model achieved a similar prediction for dementia as the genes-only model. CONCLUSION These data indicate that gene-gene interactions form significant models to identify populations susceptible to dementia.
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Affiliation(s)
- Teresa Juárez-Cedillo
- Unidad de Investigación Epidemiológica y en Servicios de Salud, Área Envejecimiento, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Nancy Martínez-Rodríguez
- Epidemiology, Endocrinology, and Nutrition Research Unit, Hospital Infantil de México Federico Gomez, Ministry of Health (SSA), Mexico City, Mexico
| | - Gilberto Vargas-Alarcon
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Enrique Juárez-Cedillo
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Antonio Valle-Medina
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Osvaldo Garrido-Acosta
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Alfredo Ramirez
- Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, University of Cologne, Köln, Germany
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11
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Kumar A, Sinha N, Kodidela S, Zhou L, Singh UP, Kumar S. Effect of benzo(a)pyrene on oxidative stress and inflammatory mediators in astrocytes and HIV-infected macrophages. PLoS One 2022; 17:e0275874. [PMID: 36240258 PMCID: PMC9565757 DOI: 10.1371/journal.pone.0275874] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 09/23/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Benzo(a)pyrene (BaP), an important polycyclic aromatic hydrocarbons (PAH) component of cigarette/tobacco smoking, is known to cause adverse health effects and is responsible for various life-threatening conditions including cancer. However, it is not yet clear whether BaP contributes to the macrophage- and astrocyte-mediated inflammatory response. METHODS We examined the acute (up to 72 h) effects of BaP on the expression of antioxidant enzymes (AOEs), cytokines/chemokines, and cytochromes P450 (CYP) enzymes in astrocytic cell lines, SVGA, and chronically HIV-infected U1 macrophage. The treated cells were examined for mRNA, protein levels of CYPs, AOEs superoxide dismutase-1 (SOD1) and catalase (CAT), cytokines/chemokines, using Western blot, multiplex ELISA, and reactive oxygen species (ROS) by flow cytometry analysis. RESULTS Upon acute exposure, BaP (1 μM) showed a significant increase in the mRNA levels of CYPs (CYP1A1 and CYP1B1), and pro-inflammatory cytokine IL-1β in SVGA cells following BaP for 24, 48, and 72h. In addition, we observed a significant increase in the mRNA levels of SOD1 and CAT at 24h of BaP treatment. In contrast, BaP did not exert any change in the protein expression of AOEs and CYP enzymes. In U1 cells, however, we noticed an interesting increase in the levels of MCP-1 as well as a modest increase in TNFα, IL-8 and IL-1β levels observed at 72 h of BaP treatment but could not reach to statistically significant level. CONCLUSIONS Overall, these results suggest that BaP contributes in part to macrophage and astrocyte-mediated neuroinflammation by mainly inducing IL-1β and MCP-1 production, which is likely to occur with the involvement of CYP and/or oxidative stress pathways.
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Affiliation(s)
- Asit Kumar
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Namita Sinha
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Sunitha Kodidela
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Lina Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Udai P. Singh
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Santosh Kumar
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States of America
- * E-mail:
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12
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Yun JH, Lee DH, Jeong HS, Kim HS, Ye SK, Cho CH. STAT3 activation in microglia exacerbates hippocampal neuronal apoptosis in diabetic brains. J Cell Physiol 2021; 236:7058-7070. [PMID: 33754353 DOI: 10.1002/jcp.30373] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/26/2021] [Accepted: 03/10/2021] [Indexed: 12/27/2022]
Abstract
Diabetes mellitus (DM) characterized by hyperglycemia leads to a variety of complications, including cognitive impairment or memory loss. The hippocampus is a key brain area for learning and memory and is one of the regions that is most sensitive to diabetes. However, the pathogenesis of diabetic neuronal lesion is not yet completely understood. We focused on the association of microglia activation and brain lesions in diabetes. In this study, we investigated whether and how signal transducer and activator of transcription 3 (STAT3) activation in microglia affects neuronal lesions in diabetic brains. Using a streptozotocin-induced type 1 DM model, we showed enhanced hippocampal neuronal apoptosis that was associated with increased STAT3 activation. We found that hyperglycemia increased the expression of inflammatory cytokines such as interferon-γ (IFN-γ) and interleukin-6, in the diabetic hippocampus. In particular, IFN-γ induced autocrine activation of microglia, and STAT3 activation is important for this process. We also demonstrated that STAT3 activation in microglia increased tumor necrosis factor-α (TNF-α) expression; subsequently, TNF-α increased neuronal apoptosis by increasing reactive oxygen species (ROS) levels in the neuronal cells. We also took advantage of mice lacking STAT3 in microglia and demonstrated that depletion of microglial STAT3 reduced neuronal apoptosis in the diabetic hippocampus. Taken together, these results suggest that STAT3 activation in microglia plays an important role in hyperglycemia-induced neuronal apoptosis in the diabetic hippocampus and provide a potential therapeutic benefit of STAT3 inhibition in microglia for preventing diabetic neuronal lesions.
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Affiliation(s)
- Jang-Hyuk Yun
- Department of Veterinary Pharmacology, College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Gangwondo, Republic of Korea
| | - Da-Hye Lee
- Department of Biomedical Sciences and Pharmacology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Han-Seok Jeong
- Department of Biomedical Sciences and Pharmacology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Hye Sun Kim
- Department of Biomedical Sciences and Pharmacology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Sang-Kyu Ye
- Department of Biomedical Sciences and Pharmacology, College of Medicine, Seoul National University, Seoul, Republic of Korea
- Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Chung-Hyun Cho
- Department of Biomedical Sciences and Pharmacology, College of Medicine, Seoul National University, Seoul, Republic of Korea
- Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Republic of Korea
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13
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Lopez-Rodriguez AB, Hennessy E, Murray CL, Nazmi A, Delaney HJ, Healy D, Fagan SG, Rooney M, Stewart E, Lewis A, de Barra N, Scarry P, Riggs-Miller L, Boche D, Cunningham MO, Cunningham C. Acute systemic inflammation exacerbates neuroinflammation in Alzheimer's disease: IL-1β drives amplified responses in primed astrocytes and neuronal network dysfunction. Alzheimers Dement 2021; 17:1735-1755. [PMID: 34080771 DOI: 10.1002/alz.12341] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/14/2022]
Abstract
Neuroinflammation contributes to Alzheimer's disease (AD) progression. Secondary inflammatory insults trigger delirium and can accelerate cognitive decline. Individual cellular contributors to this vulnerability require elucidation. Using APP/PS1 mice and AD brain, we studied secondary inflammatory insults to investigate hypersensitive responses in microglia, astrocytes, neurons, and human brain tissue. The NLRP3 inflammasome was assembled surrounding amyloid beta, and microglia were primed, facilitating exaggerated interleukin-1β (IL-1β) responses to subsequent LPS stimulation. Astrocytes were primed to produce exaggerated chemokine responses to intrahippocampal IL-1β. Systemic LPS triggered microglial IL-1β, astrocytic chemokines, IL-6, and acute cognitive dysfunction, whereas IL-1β disrupted hippocampal gamma rhythm, all selectively in APP/PS1 mice. Brains from AD patients with infection showed elevated IL-1β and IL-6 levels. Therefore, amyloid leaves the brain vulnerable to secondary inflammation at microglial, astrocytic, neuronal, and cognitive levels, and infection amplifies neuroinflammatory cytokine synthesis in humans. Exacerbation of neuroinflammation to produce deleterious outcomes like delirium and accelerated disease progression merits careful investigation in humans.
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Affiliation(s)
- Ana Belen Lopez-Rodriguez
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Edel Hennessy
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Carol L Murray
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Arshed Nazmi
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Hugh J Delaney
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland.,Discipline of Physiology, School of Medicine, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Dáire Healy
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Steven G Fagan
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Michael Rooney
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Erika Stewart
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Anouchka Lewis
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Niamh de Barra
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Philip Scarry
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Louise Riggs-Miller
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Delphine Boche
- Clinical Neurosciences, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Mark O Cunningham
- Discipline of Physiology, School of Medicine, Trinity College Dublin, Dublin, Rep. of Ireland
| | - Colm Cunningham
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute and Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Rep. of Ireland
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Luo H, Han L, Xu J. Apelin/APJ system: A novel promising target for neurodegenerative diseases. J Cell Physiol 2019; 235:638-657. [DOI: 10.1002/jcp.29001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 06/06/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Huaiqing Luo
- Department of Physiology Changsha Medical University Changsha Hunan China
- Department of Physiology, School of Basic Medical Science Central South University Changsha Hunan China
| | - Li Han
- Department of Physiology Changsha Medical University Changsha Hunan China
| | - Jin Xu
- School of Pharmaceutical Sciences Changsha Medical University Changsha Hunan China
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15
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Mohammadi G, Dargahi L, Peymani A, Mirzanejad Y, Alizadeh SA, Naserpour T, Nassiri-Asl M. The Effects of Probiotic Formulation Pretreatment (Lactobacillus helveticus R0052 and Bifidobacterium longum R0175) on a Lipopolysaccharide Rat Model. J Am Coll Nutr 2018; 38:209-217. [PMID: 30307792 DOI: 10.1080/07315724.2018.1487346] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The role of gut microbiota in the pathogenesis of several neurodegenerative disorders, including Alzheimer's disease (AD), via the gut-brain axis has recently been demonstrated; hence, modification of the intestinal microbiota composition by probiotic biotherapy could be a therapeutic target for these conditions. The aim of this study was to assess the effects of a probiotic formulation (Lactobacillus helveticus R0052 and Bifidobacterium longum R0175) on inflammatory and memory processes in lipopolysaccharide (LPS)-induced rats, one of the animal models used in peripherally induced neuroinflammation and neurodegeneration. METHODS Rats were randomly divided into four groups (Control, LPS, Probiotic + LPS, and Probiotic). All experimental groups were orally administrated maltodextrin (placebo) or probiotic (109 CFU/ml/rat) for 14 consecutive days and then were injected with saline or LPS (1 mg/kg, intraperitoneally [i.p.], single dose) 20 hours later. Memory retention ability and systemic and neuroinflammatory markers were assessed 4 hours after the injections. RESULTS Systemic exposure to LPS resulted in significant elevation of both the circulating and hippocampal levels of proinflammatory cytokines, which decreased remarkably following probiotic pretreatment. Oral bacteriotherapy with a combination of L. helveticus R0052 and B. longum R0175 also attenuated the decremental effect of LPS on memory through brain-derived neurotrophic factor (BDNF) expression at the molecular level; however, this effect was not significant in the passive avoidance test at the behavioral level. CONCLUSIONS These results suggest that the management of gut microbiota with this probiotic formulation could be a promising intervention to improve neuroinflammation-associated disorders such as AD.
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Affiliation(s)
- Ghazaleh Mohammadi
- a Department of Molecular Medicine , Qazvin University of Medical Sciences , Qazvin , Iran
| | - Leila Dargahi
- b NeuroBiology Research Center , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Amir Peymani
- c Medical Microbiology Research Center , Qazvin University of Medical Sciences , Qazvin , Iran
| | - Yazdan Mirzanejad
- d Division of Infectious Diseases , University of British Columbia , Vancouver , Canada
| | - Safar Ali Alizadeh
- c Medical Microbiology Research Center , Qazvin University of Medical Sciences , Qazvin , Iran
| | - Taghi Naserpour
- e Cellular and Molecular Research Center, Department of Pharmacology , Qazvin University of Medical Sciences , Qazvin , Iran
| | - Marjan Nassiri-Asl
- e Cellular and Molecular Research Center, Department of Pharmacology , Qazvin University of Medical Sciences , Qazvin , Iran
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16
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Chen X, Hu Y, Cao Z, Liu Q, Cheng Y. Cerebrospinal Fluid Inflammatory Cytokine Aberrations in Alzheimer's Disease, Parkinson's Disease and Amyotrophic Lateral Sclerosis: A Systematic Review and Meta-Analysis. Front Immunol 2018; 9:2122. [PMID: 30283455 PMCID: PMC6156158 DOI: 10.3389/fimmu.2018.02122] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/28/2018] [Indexed: 12/14/2022] Open
Abstract
It has been suggested that cytokine-mediated inflammation plays a key role for the onset and/or development of neurodegenerative diseases including Alzheimer's disease (AD), Parkinson's disease (PD) and Amyotrophic lateral sclerosis (ALS). However, clinical studies have yielded inconsistent results for the aberrant cytokine levels in circulation of patients with AD, PD, and ALS. Previous studies have used meta-analysis to address the inconsistent data for blood cytokine levels in the patients with AD, PD, and ALS. Here, we performed a systemic review of cerebrospinal fluid inflammatory cytokine data in patients with AD, PD and ALS, and sought to quantitatively summarize the CSF inflammatory cytokine data with a meta-analytical technique. The systematic search from Pubmed and Web of Science identified 71 articles with 2629 patients and 2049 controls for the meta-analysis. Random-effects meta-analysis demonstrated that CSF TGF-β, MCP-1, and YKL-40 levels were significantly elevated in AD patients when compared with controls. In addition, patients with PD had heightened levels of TGF-β1, IL-6, and IL-1β in CSF. Furthermore, G-CSF, IL-2, IL-15, IL-17, MCP-1, MIP-1α, TNF-α, and VEGF levels were significantly increased in patients with ALS as compared with controls. Taken together, these results not only strengthen the clinical evidence that neurodegenerative diseases are accompanied by the increased inflammatory response, but also reveal the unique inflammatory response profile in the central nervous system of patients with AD, PD and ALS. Given the robust associations between some cytokines and neurodegenerative diseases found in this meta-analysis, CSF inflammatory cytokines may be used as biomarkers for these diseases in the future.
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Affiliation(s)
| | | | | | - Qingshan Liu
- Key Laboratory of Ethnomedicine for Ministry of Education, Center on Translational Neuroscience, College of Life and Environmental Sciences, Minzu University of China, Beijing, China
| | - Yong Cheng
- Key Laboratory of Ethnomedicine for Ministry of Education, Center on Translational Neuroscience, College of Life and Environmental Sciences, Minzu University of China, Beijing, China
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Tai LM, Ghura S, Koster KP, Liakaite V, Maienschein‐Cline M, Kanabar P, Collins N, Ben‐Aissa M, Lei AZ, Bahroos N, Green SJ, Hendrickson B, Van Eldik LJ, LaDu MJ. APOE-modulated Aβ-induced neuroinflammation in Alzheimer's disease: current landscape, novel data, and future perspective. J Neurochem 2015; 133:465-88. [PMID: 25689586 PMCID: PMC4400246 DOI: 10.1111/jnc.13072] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 01/12/2023]
Abstract
Chronic glial activation and neuroinflammation induced by the amyloid-β peptide (Aβ) contribute to Alzheimer's disease (AD) pathology. APOE4 is the greatest AD-genetic risk factor; increasing risk up to 12-fold compared to APOE3, with APOE4-specific neuroinflammation an important component of this risk. This editorial review discusses the role of APOE in inflammation and AD, via a literature review, presentation of novel data on Aβ-induced neuroinflammation, and discussion of future research directions. The complexity of chronic neuroinflammation, including multiple detrimental and beneficial effects occurring in a temporal and cell-specific manner, has resulted in conflicting functional data for virtually every inflammatory mediator. Defining a neuroinflammatory phenotype (NIP) is one way to address this issue, focusing on profiling the changes in inflammatory mediator expression during disease progression. Although many studies have shown that APOE4 induces a detrimental NIP in peripheral inflammation and Aβ-independent neuroinflammation, data for APOE-modulated Aβ-induced neuroinflammation are surprisingly limited. We present data supporting the hypothesis that impaired apoE4 function modulates Aβ-induced effects on inflammatory receptor signaling, including amplification of detrimental (toll-like receptor 4-p38α) and suppression of beneficial (IL-4R-nuclear receptor) pathways. To ultimately develop APOE genotype-specific therapeutics, it is critical that future studies define the dynamic NIP profile and pathways that underlie APOE-modulated chronic neuroinflammation. In this editorial review, we present data supporting the hypothesis that impaired apoE4 function modulates Aβ-induced effects on inflammatory receptor signaling, including amplification of detrimental (TLR4-p38α) and suppression of beneficial (IL-4R-nuclear receptor) pathways, resulting in an adverse NIP that causes neuronal dysfunction. NIP, Neuroinflammatory phenotype; P.I., pro-inflammatory; A.I., anti-inflammatory.
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Affiliation(s)
- Leon M. Tai
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
| | - Shivesh Ghura
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
| | - Kevin P. Koster
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
| | | | | | - Pinal Kanabar
- UIC Center for Research Informatics University of IllinoisChicagoIllinoisUSA
| | - Nicole Collins
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
| | - Manel Ben‐Aissa
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
| | - Arden Zhengdeng Lei
- UIC Center for Research Informatics University of IllinoisChicagoIllinoisUSA
| | - Neil Bahroos
- UIC Center for Research Informatics University of IllinoisChicagoIllinoisUSA
| | | | - Bill Hendrickson
- UIC Research Resources CenterUniversity of IllinoisChicagoIllinoisUSA
| | | | - Mary Jo LaDu
- Department of Anatomy and Cell BiologyUniversity of IllinoisChicagoIllinoisUSA
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18
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Nelson PG, Kuddo T, Song EY, Dambrosia JM, Kohler S, Satyanarayana G, Vandunk C, Grether JK, Nelson KB. Selected neurotrophins, neuropeptides, and cytokines: developmental trajectory and concentrations in neonatal blood of children with autism or Down syndrome. Int J Dev Neurosci 2005; 24:73-80. [PMID: 16289943 DOI: 10.1016/j.ijdevneu.2005.10.003] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 10/07/2005] [Accepted: 10/10/2005] [Indexed: 11/22/2022] Open
Abstract
Using a double-antibody immunoaffinity assay (Luminex) and ELISA technology, we measured concentrations of certain neurotrophins, neuropeptides, and cytokines in pooled samples (one to three subjects per sample) eluted from archived neonatal blood of children with later-diagnosed autism, Down syndrome, very preterm birth, or term control infants. We also measured analytes in blood from healthy adult controls. Case or control status for infant subjects was ascertained by retrospective review of service agency medical records. We observed inhibitory substances in eluates from archived bloodspots, especially marked for measurement of BDNF. Concentrations in control subjects differed by age: BDNF rose markedly with age, while NT-3 and NT-4/5 concentrations were lower in adults than in newborn infants. IL-8 concentrations were higher in newborn infants, preterm and term, than in adults. Considered by diagnostic group, total protein was higher in Down syndrome than in either autism or control subjects. In infants with Down syndrome, concentrations of IL-8 levels were higher than in controls, whether or not corrected for total protein; NT-3 and CGRP were lower and VIP higher. In samples from autistic subjects, NT-3 levels were significantly lower than controls and an increase in VIP approached statistical significance. Concentrations of NT-4/5 and CGRP were correlated in infants with autism but not in Down syndrome or controls. Some of these results differ from earlier findings using a single-antibody recycling immunoaffinity chromatography (RIC) system. We discuss interrelationships of VIP, NT-3 and IL-8 and their potential relevance to features of the neuropathology of autism or Down syndrome.
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Affiliation(s)
- Phillip G Nelson
- National Institute of Child Health and Development, Building 31, Room 2A25, Bethesda, MD 20892-2426, USA.
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Burwinkel M, Riemer C, Schwarz A, Schultz J, Neidhold S, Bamme T, Baier M. Role of cytokines and chemokines in prion infections of the central nervous system. Int J Dev Neurosci 2004; 22:497-505. [PMID: 15465279 DOI: 10.1016/j.ijdevneu.2004.07.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2004] [Accepted: 07/12/2004] [Indexed: 11/22/2022] Open
Abstract
Prion infections of the central nervous system (CNS) are characterised by a reactive gliosis and the subsequent degeneration of neuronal tissue. The activation of glial cells, which precedes neuronal death, is likely to be initially caused by the deposition of misfolded, proteinase K-resistant, isoforms (termed PrP(res)) of the prion protein (PrP) in the brain. Cytokines and chemokines released by PrP(res)-activated glia cells may contribute directly or indirectly to the disease development by enhancement and generalisation of the gliosis and via cytotoxicity for neurons. However, the actual role of prion-induced glia activation and subsequent cytokine/chemokine secretion in disease development is still far from clear. In the present work, we review our present knowledge concerning the functional biology of cytokines and chemokines in prion infections of the CNS.
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