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Finch CE, Thorwald MA. Inhaled Pollutants of the Gero-Exposome and Later-Life Health. J Gerontol A Biol Sci Med Sci 2024; 79:glae107. [PMID: 38644649 PMCID: PMC11170295 DOI: 10.1093/gerona/glae107] [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: 12/07/2023] [Indexed: 04/23/2024] Open
Abstract
Inhaled air pollutants (AirP) comprise extraordinarily diverse particles, volatiles, and gases from traffic, wildfire, cigarette smoke, dust, and various other sources. These pollutants contain numerous toxic components, which collectively differ in relative levels of components, but broadly share chemical classes. Exposure and health outcomes from AirP are complex, depending on pollutant source, duration of exposure, and socioeconomic status. We discuss examples in the current literature on organ responses to AirP, with a focus on lung, arteries, and brain. Some transcriptional responses are shared. It is well accepted that AirP contributes to Alzheimer's disease and other neurodegenerative conditions in the Gero-Exposome. However, we do not know which chemical compounds initiate these changes and how activation of these transcriptional pathways is further modified by genetics and prenatal development.
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Affiliation(s)
- Caleb E Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - Max A Thorwald
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
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2
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Sun X, Ma S, Guo Y, Chen C, Pan L, Cui Y, Chen Z, Dijkhuizen RM, Zhou Y, Boltze J, Yu Z, Li P. The association between air pollutant exposure and cerebral small vessel disease imaging markers with modifying effects of PRS-defined genetic susceptibility. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 281:116638. [PMID: 38944013 DOI: 10.1016/j.ecoenv.2024.116638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 07/01/2024]
Abstract
Studies have highlighted a possible link between air pollution and cerebral small vessel disease (CSVD) imaging markers. However, the exact association and effects of polygenic risk score (PRS) defined genetic susceptibility remains unclear. This cross-sectional study used data from the UK Biobank. Participants aged 40-69 years were recruited between the year 2006 and 2010. The annual average concentrations of NOX, NO2, PM2.5, PM2.5-10, PM2.5 absorbance, and PM10, were estimated, and joint exposure to multiple air pollutants was reflected in the air pollution index (APEX). Air pollutant exposure was classified into the low (T1), intermediate (T2), and high (T3) tertiles. Three CSVD markers were used: white matter hyper-intensity (WMH), mean diffusivity (MD), and fractional anisotropy (FA). The first principal components of the MD and FA measures in the 48 white matter tracts were analysed. The sample consisted of 44,470 participants from the UK Biobank. The median (T1-T3) concentrations of pollutants were as follows: NO2, 25.5 (22.4-28.7) μg/m3; NOx, 41.3 (36.2-46.7) μg/m3; PM10, 15.9 (15.4-16.4) μg/m3; PM2.5, 9.9 (9.5-10.3) μg/m3; PM2.5 absorbance, 1.1 (1.0-1.2) per metre; and PM2.5-10, 6.1 (5.9-6.3) μg/m3. Compared with the low group, the high group's APEX, NOX, and PM2.5 levels were associated with increased WMH volumes, and the estimates (95 %CI) were 0.024 (0.003, 0.044), 0.030 (0.010, 0.050), and 0.032 (0.011, 0.053), respectively, after adjusting for potential confounders. APEX, PM10, PM2.5 absorbance, and PM2.5-10 exposure in the high group were associated with increased FA values compared to that in the low group. Sex-specific analyses revealed associations only in females. Regarding the combined associations of air pollutant exposure and PRS-defined genetic susceptibility with CSVD markers, the associations of NO2, NOX, PM2.5, and PM2.5-10 with WMH were more profound in females with low PRS-defined genetic susceptibility, and the associations of PM10, PM2.5, and PM2.5 absorbance with FA were more profound in females with higher PRS-defined genetic susceptibility. Our study demonstrated that air pollutant exposure may be associated with CSVD imaging markers, with females being more susceptible, and that PRS-defined genetic susceptibility may modify the associations of air pollutants.
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Affiliation(s)
- Xiaowei Sun
- Clinical Research Center, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Shiyang Ma
- Clinical Research Center, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China; Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yunlu Guo
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Caiyang Chen
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Lijun Pan
- Department of Radiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Yidan Cui
- Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zengai Chen
- Department of Radiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Rick M Dijkhuizen
- Biomedical MR Imaging and Spectroscopy Group, Center for Image Sciences, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands
| | - Yan Zhou
- Department of Radiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Johannes Boltze
- School of Life Sciences, University of Warwick, Coventry, UK.
| | - Zhangsheng Yu
- Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Peiying Li
- Clinical Research Center, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China; Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China; Biomedical MR Imaging and Spectroscopy Group, Center for Image Sciences, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands; Outcomes Research Consortium, Cleveland, OH, United States.
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Han Z, Yang C, He H, Huang T, Yin Q, Tian G, Wu Y, Hu W, Lu L, Bajpai AK, Mi J, Xu F. Systems Genetics Analyses Reveals Key Genes Related to Behavioral Traits in the Striatum of CFW Mice. J Neurosci 2024; 44:e0252242024. [PMID: 38777602 PMCID: PMC11211725 DOI: 10.1523/jneurosci.0252-24.2024] [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: 02/06/2024] [Revised: 04/10/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
The striatum plays a central role in directing many complex behaviors ranging from motor control to action choice and reward learning. In our study, we used 55 male CFW mice with rapid decay linkage disequilibrium to systematically mine the striatum-related behavioral functional genes by analyzing their striatal transcriptomes and 79 measured behavioral phenotypic data. By constructing a gene coexpression network, we clustered the genes into 13 modules, with most of them being positively correlated with motor traits. Based on functional annotations as well as Fisher's exact and hypergeometric distribution tests, brown and magenta modules were identified as core modules. They were significantly enriched for striatal-related functional genes. Subsequent Mendelian randomization analysis verified the causal relationship between the core modules and dyskinesia. Through the intramodular gene connectivity analysis, Adcy5 and Kcnma1 were identified as brown and magenta module hub genes, respectively. Knock outs of both Adcy5 and Kcnma1 lead to motor dysfunction in mice, and KCNMA1 acts as a risk gene for schizophrenia and smoking addiction in humans. We also evaluated the cellular composition of each module and identified oligodendrocytes in the striatum to have a positive role in motor regulation.
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Affiliation(s)
- Zhe Han
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Chunhua Yang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Hongjie He
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Tingting Huang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Quanting Yin
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Geng Tian
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Yuyong Wu
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Wei Hu
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee 38163
| | - Akhilesh Kumar Bajpai
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee 38163
| | - Jia Mi
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
| | - Fuyi Xu
- School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Yantai 264003, Shandong Province, China
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Ahmed C, Greve HJ, Garza‐Lombo C, Malley JA, Johnson JA, Oblak AL, Block ML. Peripheral HMGB1 is linked to O 3 pathology of disease-associated astrocytes and amyloid. Alzheimers Dement 2024; 20:3551-3566. [PMID: 38624088 PMCID: PMC11095433 DOI: 10.1002/alz.13825] [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: 12/11/2023] [Revised: 02/07/2024] [Accepted: 02/26/2024] [Indexed: 04/17/2024]
Abstract
INTRODUCTION Ozone (O3) is an air pollutant associated with Alzheimer's disease (AD) risk. The lung-brain axis is implicated in O3-associated glial and amyloid pathobiology; however, the role of disease-associated astrocytes (DAAs) in this process remains unknown. METHODS The O3-induced astrocyte phenotype was characterized in 5xFAD mice by spatial transcriptomics and proteomics. Hmgb1fl/fl LysM-Cre+ mice were used to assess the role of peripheral myeloid cell high mobility group box 1 (HMGB1). RESULTS O3 increased astrocyte and plaque numbers, impeded the astrocyte proteomic response to plaque deposition, augmented the DAA transcriptional fingerprint, increased astrocyte-microglia contact, and reduced bronchoalveolar lavage immune cell HMGB1 expression in 5xFAD mice. O3-exposed Hmgb1fl/fl LysM-Cre+ mice exhibited dysregulated DAA mRNA markers. DISCUSSION Astrocytes and peripheral myeloid cells are critical lung-brain axis interactors. HMGB1 loss in peripheral myeloid cells regulates the O3-induced DAA phenotype. These findings demonstrate a mechanism and potential intervention target for air pollution-induced AD pathobiology. HIGHLIGHTS Astrocytes are part of the lung-brain axis, regulating how air pollution affects plaque pathology. Ozone (O3) astrocyte effects are associated with increased plaques and modified by plaque localization. O3 uniquely disrupts the astrocyte transcriptomic and proteomic disease-associated astrocyte (DAA) phenotype in plaque associated astrocytes (PAA). O3 changes the PAA cell contact with microglia and cell-cell communication gene expression. Peripheral myeloid cell high mobility group box 1 regulates O3-induced transcriptomic changes in the DAA phenotype.
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Affiliation(s)
- Chandrama Ahmed
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
| | - Hendrik J. Greve
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
| | - Carla Garza‐Lombo
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
| | - Jamie A. Malley
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
| | - James A. Johnson
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
| | - Adrian L. Oblak
- Department of Radiology and Imaging SciencesIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndiana University School of MedicineIndianapolisIndianaUSA
| | - Michelle L. Block
- Department of Pharmacology and ToxicologyIndiana University School of MedicineThe Stark Neurosciences Research InstituteIndianapolisIndianaUSA
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Chen M, Wu T. Nanoparticles and neurodegeneration: Insights on multiple pathways of programmed cell death regulated by nanoparticles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168739. [PMID: 38008311 DOI: 10.1016/j.scitotenv.2023.168739] [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: 07/27/2023] [Revised: 11/13/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Currently, nanoparticles (NPs) are extensively applied in the diagnosis and treatment of neurodegenerative diseases (NDs). With the rapid development and increasing exposure to the public, the potential neurotoxicity associated with NDs caused by NPs has attracted the researchers' attentions but their biosafety assessments are still far behind relevant application studies. Based on recent research, this review aims to conduct a comprehensive and systematic analysis of neurotoxicity induced by NPs. The 191 studies selected according to inclusion and exclusion criteria were imported into the software, and the co-citations and keywords of the included literatures were analyzed to find the breakthrough point of previous studies. According to the available studies, the routes of NPs entering into the normal and injured brain were various, and then to be distributed and accumulated in living bodies. When analyzing the adverse effects induced by NPs, we focused on multiple programmed cell deaths (PCDs), especially ferroptosis triggered by NPs and their tight connection and crosstalk that have been found playing critical roles in the pathogenesis of NDs and their underlying toxic mechanisms. The activation of multiple PCD pathways by NPs provides a scientific basis for the occurrence and development of NDs. Furthermore, the adoption of new methodologies for evaluating the biosafety of NPs would benefit the next generation risk assessment (NGRA) of NPs and their toxic interventions. This would help ensure their safe application and sustainable development in the field of medical neurobiology.
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Affiliation(s)
- Min Chen
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education; School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education; School of Public Health, Southeast University, Nanjing 210009, PR China.
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6
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Ghosh S, Tamilselvi S, Williams C, Jayaweera SW, Iashchishyn IA, Šulskis D, Gilthorpe JD, Olofsson A, Smirnovas V, Svedružić ŽM, Morozova-Roche LA. ApoE Isoforms Inhibit Amyloid Aggregation of Proinflammatory Protein S100A9. Int J Mol Sci 2024; 25:2114. [PMID: 38396791 PMCID: PMC10889306 DOI: 10.3390/ijms25042114] [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: 12/22/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Increasing evidence suggests that the calcium-binding and proinflammatory protein S100A9 is an important player in neuroinflammation-mediated Alzheimer's disease (AD). The amyloid co-aggregation of S100A9 with amyloid-β (Aβ) is an important hallmark of this pathology. Apolipoprotein E (ApoE) is also known to be one of the important genetic risk factors of AD. ApoE primarily exists in three isoforms, ApoE2 (Cys112/Cys158), ApoE3 (Cys112/Arg158), and ApoE4 (Arg112/Arg158). Even though the difference lies in just two amino acid residues, ApoE isoforms produce differential effects on the neuroinflammation and activation of the microglial state in AD. Here, we aim to understand the effect of the ApoE isoforms on the amyloid aggregation of S100A9. We found that both ApoE3 and ApoE4 suppress the aggregation of S100A9 in a concentration-dependent manner, even at sub-stoichiometric ratios compared to S100A9. These interactions lead to a reduction in the quantity and length of S100A9 fibrils. The inhibitory effect is more pronounced if ApoE isoforms are added in the lipid-free state versus lipidated ApoE. We found that, upon prolonged incubation, S100A9 and ApoE form low molecular weight complexes with stochiometric ratios of 1:1 and 2:1, which remain stable under SDS-gel conditions. These complexes self-assemble also under the native conditions; however, their interactions are transient, as revealed by glutaraldehyde cross-linking experiments and molecular dynamics (MD) simulation. MD simulation demonstrated that the lipid-binding C-terminal domain of ApoE and the second EF-hand calcium-binding motif of S100A9 are involved in these interactions. We found that amyloids of S100A9 are cytotoxic to neuroblastoma cells, and the presence of either ApoE isoforms does not change the level of their cytotoxicity. A significant inhibitory effect produced by both ApoE isoforms on S100A9 amyloid aggregation can modulate the amyloid-neuroinflammatory cascade in AD.
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Affiliation(s)
- Shamasree Ghosh
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Shanmugam Tamilselvi
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Chloe Williams
- Department of Medical and Translational Biology, Umeå University, SE-90187 Umeå, Sweden; (C.W.); (J.D.G.)
| | - Sanduni W. Jayaweera
- Department of Clinical Microbiology, Umeå University, SE-90187 Umeå, Sweden; (S.W.J.); (A.O.)
| | - Igor A. Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
| | - Darius Šulskis
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania; (D.Š.); (V.S.)
| | - Jonathan D. Gilthorpe
- Department of Medical and Translational Biology, Umeå University, SE-90187 Umeå, Sweden; (C.W.); (J.D.G.)
| | - Anders Olofsson
- Department of Clinical Microbiology, Umeå University, SE-90187 Umeå, Sweden; (S.W.J.); (A.O.)
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania; (D.Š.); (V.S.)
| | | | - Ludmilla A. Morozova-Roche
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden; (S.G.); (S.T.); (I.A.I.)
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Park H, Kwon HS, Lee KY, Kim YE, Son JW, Choi NY, Lee EJ, Han MH, Park DW, Kim S, Koh SH. GV1001 modulates neuroinflammation and improves memory and behavior through the activation of gonadotropin-releasing hormone receptors in a triple transgenic Alzheimer's disease mouse model. Brain Behav Immun 2024; 115:295-307. [PMID: 37884161 DOI: 10.1016/j.bbi.2023.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/22/2023] [Accepted: 10/22/2023] [Indexed: 10/28/2023] Open
Abstract
GV1001 protects neural cells from amyloid-β (Aβ) toxicity and other stressors in in vitro studies and demonstrates clinically beneficial effects in patients with moderate to severe Alzheimer's disease (AD). Here, we investigated the protective effects and mechanism of action of GV1001 in triple transgenic AD (3xTg-AD) mice. We found that GV1001 improved memory and cognition in middle- and old-aged 3xTg-AD mice. Additionally, it reduced Aβ oligomer and phospho-tau (Ser202 and Thr205) levels in the brain, and mitigated neuroinflammation by promoting a neuroprotective microglial and astrocyte phenotype while diminishing the neurotoxic ones. In vitro, GV1001 bound to gonadotropin releasing hormone receptors (GnRHRs) with high affinity. Levels of cyclic adenosine monophosphate, a direct downstream effector of activated GnRHRs, increased after GV1001 treatment. Furthermore, inhibition of GnRHRs blocked GV1001-induced effects. Thus, GV1001 might improve cognitive and memory functions of 3xTg-AD mice by suppressing neuroinflammation and reducing Aβ oligomers levels and phospho-tau by activating GnRHRs and their downstream signaling pathways.
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Affiliation(s)
- Hyunhee Park
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Hyuk Sung Kwon
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Kyu-Yong Lee
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Ye Eun Kim
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Jeong-Woo Son
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Na-Young Choi
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Eun Ji Lee
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Myung-Hoon Han
- Department of Neurosurgery, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Dong Woo Park
- Department of Radiology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea
| | - Sangjae Kim
- Teloid Inc., 3580 Wilshire Boulevard, Suite 900-31, Los Angeles, CA 90010, USA.
| | - Seong-Ho Koh
- Department of Neurology, Hanyang University Guri Hospital, Hanyang University College of Medicine, 153, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, South Korea; Department of Translational Medicine, Hanyang University Graduate School of Biomedical Science & Engineering, Seoul 04763, South Korea.
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8
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Saveleva L, Sima M, Klema J, Krejčík Z, Vartiainen P, Sitnikova V, Belaya I, Malm T, Jalava PI, Rössner P, Kanninen KM. Transcriptomic alterations in the olfactory bulb induced by exposure to air pollution: Identification of potential biomarkers and insights into olfactory system function. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104316. [PMID: 37981204 DOI: 10.1016/j.etap.2023.104316] [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: 08/15/2023] [Accepted: 11/14/2023] [Indexed: 11/21/2023]
Abstract
This study evaluated how exposure to the ubiquitous air pollution component, ultrafine particles (UFPs), alters the olfactory bulb (OB) transcriptome. The study utilised a whole-body inhalation chamber to simulate real-life conditions and focused on UFPs due to their high translocation and deposition ability in OBs as well as their prevalence in ambient air. Female C57BL/6J mice were exposed to clean air or to freshly generated combustion derived UFPs for two weeks, after which OBs were dissected and mRNA transcripts were investigated using RNA sequencing analysis. For the first time, transcriptomics was applied to determine changes in mRNA expression levels occurring after subacute exposure to UFPs in the OBs. We found forty-five newly described mRNAs to be involved in air pollution-induced responses, including genes involved in odorant binding, synaptic regulation, and myelination signalling pathway, providing new gene candidates for future research. This study provides new insights for the environmental science and neuroscience fields and nominates future research directions.
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Affiliation(s)
- Liudmila Saveleva
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Michal Sima
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine CAS, Vídeňská 1083, Prague 142 20, Czech Republic
| | - Jiri Klema
- Department of Computer Science, Faculty of Electrical Engineering, Czech Technical University in Prague, Jugoslávských partyzánů 1580/3, Prague 160 00, Czech Republic
| | - Zdeněk Krejčík
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Vídeňská 1083, Prague 142 20, Czech Republic
| | - Petra Vartiainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Valeriia Sitnikova
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Irina Belaya
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Pasi I Jalava
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Pavel Rössner
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine CAS, Vídeňská 1083, Prague 142 20, Czech Republic
| | - Katja M Kanninen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland.
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Gao P. Exploring Single-Cell Exposomics by Mass Spectrometry. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12201-12209. [PMID: 37561608 PMCID: PMC10448745 DOI: 10.1021/acs.est.3c04524] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Indexed: 08/12/2023]
Abstract
Single-cell exposomics, a revolutionary approach that investigates cell-environment interactions at cellular and subcellular levels, stands distinct from conventional bulk exposomics. Leveraging advancements in mass spectrometry, it provides a detailed perspective on cellular dynamics, interactions, and responses to environmental stimuli and their impacts on human health. This work delves into this innovative realm, highlighting the nuanced interplay between environmental stressors and biological responses at cellular and subcellular levels. The application of spatial mass spectrometry in single-cell exposomics is discussed, revealing the intricate spatial organization and molecular composition within individual cells. Cell-type-specific exposomics, shedding light on distinct susceptibilities and adaptive strategies of various cell types to environmental exposures, is also examined. The Perspective further emphasizes the integration with molecular and cellular biology approaches to validate hypotheses derived from single-cell exposomics in a comprehensive biological context. Looking toward the future, we anticipate continued technological advancements and convergence with other -omics approaches and discuss implications for environmental health research, disease progression studies, and precision medicine. The final emphasis is on the need for robust computational tools and interdisciplinary collaboration to fully leverage the potential of single-cell exposomics, acknowledging the complexities inherent to this paradigm.
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Affiliation(s)
- Peng Gao
- Department
of Environmental and Occupational Health and Department of Civil and
Environmental Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- UPMC
Hillman Cancer Center, Pittsburgh, Pennsylvania 15232, United States
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10
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Kilian JG, Mejias-Ortega M, Hsu HW, Herman DA, Vidal J, Arechavala RJ, Renusch S, Dalal H, Hasen I, Ting A, Rodriguez-Ortiz CJ, Lim SL, Lin X, Vu J, Saito T, Saido TC, Kleinman MT, Kitazawa M. Exposure to quasi-ultrafine particulate matter accelerates memory impairment and Alzheimer's disease-like neuropathology in the AppNL-G-F knock-in mouse model. Toxicol Sci 2023; 193:175-191. [PMID: 37074955 PMCID: PMC10230292 DOI: 10.1093/toxsci/kfad036] [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] [Indexed: 04/20/2023] Open
Abstract
Exposure to traffic-related air pollution consisting of particulate matter (PM) is associated with cognitive decline leading to Alzheimer's disease (AD). In this study, we sought to examine the neurotoxic effects of exposure to ultrafine PM and how it exacerbates neuronal loss and AD-like neuropathology in wildtype (WT) mice and a knock-in mouse model of AD (AppNL-G-F/+-KI) when the exposure occurs at a prepathologic stage or at a later age with the presence of neuropathology. AppNL-G-F/+-KI and WT mice were exposed to concentrated ultrafine PM from local ambient air in Irvine, California, for 12 weeks, starting at 3 or 9 months of age. Particulate matter-exposed animals received concentrated ultrafine PM up to 8 times above the ambient levels, whereas control animals were exposed to purified air. Particulate matter exposure resulted in a marked impairment of memory tasks in prepathologic AppNL-G-F/+-KI mice without measurable changes in amyloid-β pathology, synaptic degeneration, and neuroinflammation. At aged, both WT and AppNL-G-F/+-KI mice exposed to PM showed a significant memory impairment along with neuronal loss. In AppNL-G-F/+-KI mice, we also detected an increased amyloid-β buildup and potentially harmful glial activation including ferritin-positive microglia and C3-positive astrocytes. Such glial activation could promote the cascade of degenerative consequences in the brain. Our results suggest that exposure to PM impairs cognitive function at both ages while exacerbation of AD-related pathology and neuronal loss may depend on the stage of pathology, aging, and/or state of glial activation. Further studies will be required to unveil the neurotoxic role of glial activation activated by PM exposure.
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Affiliation(s)
- Jason G Kilian
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - Marina Mejias-Ortega
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Department of Cell Biology, Genetics and Physiology, Facultad de Ciencias, Instituto de Investigacion Biomedica de Malaga-IBIMA, Universidad de Malaga, Malaga, Spain
- Centro de Investigación Biomedica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Heng-Wei Hsu
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - David A Herman
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Janielle Vidal
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - Rebecca J Arechavala
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Samantha Renusch
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Hansal Dalal
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Irene Hasen
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Amanda Ting
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Carlos J Rodriguez-Ortiz
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - Siok-Lam Lim
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - Xiaomeng Lin
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Joan Vu
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
| | - Takashi Saito
- Department of Neurocognitive Science, Institute of Brain Science, Nagoya City University, Nagoya, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Wako, Japan
| | - Michael T Kleinman
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
| | - Masashi Kitazawa
- Department of Environmental and Occupational Health, Center for Occupational and Environmental Health (COEH), University of California, Irvine, California 92697-1830, USA
- Institute for Memory Impairmants and Neurological Disorders (UCI MIND), University of California, Irvine, California 92697, USA
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Zordão OP, Campolim CM, Yariwake VY, Castro G, Ferreira CKDO, Santos A, Norberto S, Veras MM, Saad MJA, Saldiva PHN, Kim YB, Prada PO. Maternal exposure to air pollution alters energy balance transiently according to gender and changes gut microbiota. Front Endocrinol (Lausanne) 2023; 14:1069243. [PMID: 37082122 PMCID: PMC10112381 DOI: 10.3389/fendo.2023.1069243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 03/07/2023] [Indexed: 04/22/2023] Open
Abstract
Introduction The timing of maternal exposure to air pollution is crucial to define metabolic changes in the offspring. Here we aimed to determine the most critical period of maternal exposure to particulate matter (PM2.5) that impairs offspring's energy metabolism and gut microbiota composition. Methods Unexposed female and male C57BL/6J mice were mated. PM2.5 or filtered air (FA) exposure occurred only in gestation (PM2.5/FA) or lactation (FA/PM2.5). We studied the offspring of both genders. Results PM2.5 exposure during gestation increased body weight (BW) at birth and from weaning to young in male adulthood. Leptin levels, food intake, Agrp, and Npy levels in the hypothalamus were also increased in young male offspring. Ikbke, Tnf increased in male PM2.5/FA. Males from FA/PM2.5 group were protected from these phenotypes showing higher O2 consumption and Ucp1 in the brown adipose tissue. In female offspring, we did not see changes in BW at weaning. However, adult females from PM2.5/FA displayed higher BW and leptin levels, despite increased energy expenditure and thermogenesis. This group showed a slight increase in food intake. In female offspring from FA/PM2.5, BW, and leptin levels were elevated. This group displayed higher energy expenditure and a mild increase in food intake. To determine if maternal exposure to PM2.5 could affect the offspring's gut microbiota, we analyzed alpha diversity by Shannon and Simpson indexes and beta diversity by the Linear Discriminant Analysis (LDA) in offspring at 30 weeks. Unlike males, exposure during gestation led to higher adiposity and leptin maintenance in female offspring at this age. Gestation exposure was associated with decreased alpha diversity in the gut microbiota in both genders. Discussion Our data support that exposure to air pollution during gestation is more harmful to metabolism than exposure during lactation. Male offspring had an unfavorable metabolic phenotype at a young age. However, at an older age, only females kept more adiposity. Ultimately, our data highlight the importance of controlling air pollution, especially during gestation.
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Affiliation(s)
- Olivia Pizetta Zordão
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Clara Machado Campolim
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Victor Yuji Yariwake
- Laboratory of Environmental and Experimental Pathology, Department of Pathology, University of Sao Paulo School of Medicine, Sao Paulo, SP, Brazil
| | - Gisele Castro
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | | | - Andrey Santos
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Sónia Norberto
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Mariana Matera Veras
- Laboratory of Environmental and Experimental Pathology, Department of Pathology, University of Sao Paulo School of Medicine, Sao Paulo, SP, Brazil
| | - Mario Jose Abdalla Saad
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Paulo Hilário Nascimento Saldiva
- Laboratory of Environmental and Experimental Pathology, Department of Pathology, University of Sao Paulo School of Medicine, Sao Paulo, SP, Brazil
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, United States
| | - Patricia Oliveira Prada
- Department of Internal Medicine, School of Medical Science, State University of Campinas (UNICAMP), Campinas, SP, Brazil
- School of Applied Sciences, State University of Campinas (UNICAMP), Limeira, SP, Brazil
- *Correspondence: Patricia Oliveira Prada, ;
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12
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Puris E, Saveleva L, Górová V, Vartiainen P, Kortelainen M, Lamberg H, Sippula O, Malm T, Jalava PI, Auriola S, Fricker G, Kanninen KM. Air pollution exposure increases ABCB1 and ASCT1 transporter levels in mouse cortex. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 96:104003. [PMID: 36283621 DOI: 10.1016/j.etap.2022.104003] [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: 07/08/2022] [Revised: 10/19/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Membrane transporters are important for maintaining brain homeostasis by regulating the passage of solutes into, out of, and within the brain. Growing evidence suggests neurotoxic effects of air pollution exposure and its contribution to neurodegenerative disorders, including Alzheimer's disease (AD), yet limited knowledge is available on the exact cellular impacts of exposure. This study investigates how exposure to ubiquitous solid components of air pollution, ultrafine particles (UFPs), influence brain homeostasis by affecting protein levels of membrane transporters. Membrane transporters were quantified and compared in brain cortical samples of wild-type and the 5xFAD mouse model of AD in response to subacute exposure to inhaled UFPs. The cortical ASCT1 and ABCB1 transporter levels were elevated in wild-type and 5xFAD mice subjected to a 2-week UFP exposure paradigm, suggesting impairment of brain homeostatic mechanisms. This study provides new insight on the molecular mechanisms underlying adverse effects of air pollution on the brain.
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Affiliation(s)
- Elena Puris
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
| | - Liudmila Saveleva
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Veronika Górová
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Petra Vartiainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Miika Kortelainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Heikki Lamberg
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Olli Sippula
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Pasi I Jalava
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio 70211, Finland
| | - Seppo Auriola
- School of Pharmacy, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Gert Fricker
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany
| | - Katja M Kanninen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio 70211, Finland.
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13
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Neuroprotective effects of dimethyl fumarate against depression-like behaviors via astrocytes and microglia modulation in mice: possible involvement of the HCAR2/Nrf2 signaling pathway. Naunyn Schmiedebergs Arch Pharmacol 2022; 395:1029-1045. [PMID: 35665831 DOI: 10.1007/s00210-022-02247-x] [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: 02/18/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
Abstract
We postulated that dimethyl fumarate (DMF) exerts neuroprotective effects against depression-like behaviors through astrocytes and microglia modulation. To ascertain our hypothesis and define the mechanistic pathways involved in effect of DMF on neuroinflammation, we used the depression model induced by chronic unpredictable mild stress (CUMS), in which, the mice were exposed to stressful events for 28 days and from the 14th day they received DMF in the doses of 50 and 100 mg/kg or fluoxetine 10 mg/kg or saline. On the 29th day, the animals were subjected to behavioral tests. Microglia (Iba1) and astrocyte (GFAP) marker expressions were evaluated by immunofluorescence analyzes and the cytokines TNF-α and IL-Iβ by immunoenzymatic assay. In addition, computational target prediction, 3D protein structure prediction, and docking calculations were performed with monomethyl fumarate (DMF active metabolite) and the Keap1 and HCAR2 proteins, which suggested that these could be the probable targets related protective effects. CUMS induced anxiety- and depressive-like behaviors, cognitive deficit, decreased GFAP, and increased Iba1, TNF-α, and IL-Iβ expression in the hippocampus. These alterations were reversed by DMF. Thus, it is suggested that one of the mechanisms involved in the antidepressant effect of DMF is neuroinflammatory suppression, through the signaling pathway HCAR2/Nrf2. However, more studies must be performed to better understand the molecular mechanisms of this drug.
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14
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Cardiac NF-κB Acetylation Increases While Nrf2-Related Gene Expression and Mitochondrial Activity Are Impaired during the Progression of Diabetes in UCD-T2DM Rats. Antioxidants (Basel) 2022; 11:antiox11050927. [PMID: 35624791 PMCID: PMC9137621 DOI: 10.3390/antiox11050927] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
Abstract
The onset of type II diabetes increases the heart’s susceptibility to oxidative damage because of the associated inflammation and diminished antioxidant response. Transcription factor NF-κB initiates inflammation while Nrf2 controls antioxidant defense. Current evidence suggests crosstalk between these transcription factors that may become dysregulated during type II diabetes mellitus (T2DM) manifestation. The objective of this study was to examine the dynamic changes that occur in both transcription factors and target genes during the progression of T2DM in the heart. Novel UC Davis T2DM (UCD-T2DM) rats at the following states were utilized: (1) lean, control Sprague-Dawley (SD; n = 7), (2) insulin-resistant pre-diabetic UCD-T2DM (Pre; n = 9), (3) 2-week recently diabetic UCD-T2DM (2Wk; n = 9), (4) 3-month diabetic UCD-T2DM (3Mo; n = 14), and (5) 6-month diabetic UCD-T2DM (6Mo; n = 9). NF-κB acetylation increased 2-fold in 3Mo and 6Mo diabetic animals compared to SD and Pre animals. Nox4 protein increased 4-fold by 6Mo compared to SD. Nrf2 translocation increased 82% in Pre compared to SD but fell 47% in 6Mo animals. GCLM protein fell 35% in 6Mo animals compared to Pre. Hmox1 mRNA decreased 45% in 6Mo animals compared to SD. These data suggest that during the progression of T2DM, NF-κB related genes increase while Nrf2 genes are suppressed or unchanged, perpetuating inflammation and a lesser ability to handle an oxidant burden altering the heart’s redox state. Collectively, these changes likely contribute to the diabetes-associated cardiovascular complications.
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Shin JM, Son YJ, Ha IJ, Erdenebileg S, Jung DS, Song DG, Kim YS, Kim SM, Nho CW. Artemisia argyi extract alleviates inflammation in a DSS-induced colitis mouse model and enhances immunomodulatory effects in lymphoid tissues. BMC Complement Med Ther 2022; 22:64. [PMID: 35277165 PMCID: PMC8917695 DOI: 10.1186/s12906-022-03536-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 02/22/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The incidence of inflammatory bowel disease (IBD), an inflammatory disorder of the gastrointestinal system has increased. IBD, characterized by aberrant immune responses against antigens, is thought to be caused by the invasion of enterobacteria. The pathogenesis of IBD is complicated, hence novel effective therapeutic agents are warranted. Therefore, this study evaluates the potential of Artemisia argyi, a medicinal herb, in alleviating IBD.
Methods
The effectiveness of the A. argyi ethanol extract was verified both in vitro and in vivo. Inflammation was induced in RAW 264.7 cells by 1 μg/mL of lipopolysaccharide (LPS) and by 3% dextran sodium sulfate (DSS) in a DSS-induced colitis mouse model. During the ten-day colitis induction, 200 mg/kg of A. argyi ethanol extract was orally administered to the treatment group. Levels of inflammation-related proteins and genes were analyzed in the colon, serum, and lymphoid tissues, i.e., Peyer’s patches (PPs) and spleen. The chemical constituent of the A. argyi ethanol extract was identified using an ultra-high performance liquid chromatography mass spectrometry (UPLC-MS/MS) analysis.
Results
A. argyi ethanol extract treatment ameliorated IBD symptoms and reduced the expression of inflammation-related proteins and genes in the colon and serum samples. Furthermore, A. argyi treatment induced the activation of anti-oxidative associated proteins, such as nuclear factor-erythroid factor 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1); and the treatment have also inhibited nuclear factor-κB (NF-κB), a central mediator of inflammatory responses. A. argyi enhanced the immunomodulatory effects in the PPs and spleen, which may stem from interleukin-10 (IL-10) upregulation. Chemical analysis identified a total of 28 chemical compounds, several of which have been reported to exert anti-inflammatory effects.
Conclusions
The effectiveness of the A. argyi ethanol extract in alleviating IBD was demonstrated; application of the extract successfully mitigated IBD symptoms, and enhanced immunomodulatory responses in lymphoid tissues. These findings suggest A. argyi as a promising herbal medicine for IBD treatment.
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16
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Huuskonen MT, Liu Q, Lamorie-Foote K, Shkirkova K, Connor M, Patel A, Montagne A, Baertsch H, Sioutas C, Morgan TE, Finch CE, Zlokovic BV, Mack WJ. Air Pollution Particulate Matter Amplifies White Matter Vascular Pathology and Demyelination Caused by Hypoperfusion. Front Immunol 2021; 12:785519. [PMID: 34868068 PMCID: PMC8635097 DOI: 10.3389/fimmu.2021.785519] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/01/2021] [Indexed: 12/04/2022] Open
Abstract
Cerebrovascular pathologies are commonly associated with dementia. Because air pollution increases arterial disease in humans and rodent models, we hypothesized that air pollution would also contribute to brain vascular dysfunction. We examined the effects of exposing mice to nanoparticulate matter (nPM; aerodynamic diameter ≤200 nm) from urban traffic and interactions with cerebral hypoperfusion. C57BL/6 mice were exposed to filtered air or nPM with and without bilateral carotid artery stenosis (BCAS) and analyzed by multiparametric MRI and histochemistry. Exposure to nPM alone did not alter regional cerebral blood flow (CBF) or blood brain barrier (BBB) integrity. However, nPM worsened the white matter hypoperfusion (decreased CBF on DSC-MRI) and exacerbated the BBB permeability (extravascular IgG deposits) resulting from BCAS. White matter MRI diffusion metrics were abnormal in mice subjected to cerebral hypoperfusion and worsened by combined nPM+BCAS. Axonal density was reduced equally in the BCAS cohorts regardless of nPM status, whereas nPM exposure caused demyelination in the white matter with or without cerebral hypoperfusion. In summary, air pollution nPM exacerbates cerebrovascular pathology and demyelination in the setting of cerebral hypoperfusion, suggesting that air pollution exposure can augment underlying cerebrovascular contributions to cognitive loss and dementia in susceptible elderly populations.
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Affiliation(s)
- Mikko T. Huuskonen
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Qinghai Liu
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Krista Lamorie-Foote
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Kristina Shkirkova
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Michelle Connor
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Arati Patel
- Department of Neurological Surgery, University of California San Francisco School of Medicine, San Francisco, CA, United States
| | - Axel Montagne
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Hans Baertsch
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - Constantinos Sioutas
- Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, United States
| | - Todd E. Morgan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, United States
| | - Caleb E. Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, United States
| | - Berislav V. Zlokovic
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
| | - William J. Mack
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, United States
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
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17
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Finch CE, Haghani A. Gene-Environment Interactions and Stochastic Variations in the Gero-Exposome. J Gerontol A Biol Sci Med Sci 2021; 76:1740-1747. [PMID: 33580247 PMCID: PMC8436990 DOI: 10.1093/gerona/glab045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Indexed: 12/11/2022] Open
Abstract
The limited heritability of human life spans suggests an important role for gene-environment (G × E) interactions across the life span (T), from gametes to geronts. Multilevel G × E × T interactions of aging phenotypes are conceptualized in the Gero-Exposome as Exogenous and Endogenous domains. Stochastic variations in the Endogenous domain contribute to the diversity of aging phenotypes, shown for the diversity of inbred Caenorhabditis elegans life spans in the same culture environment, and for variegated gene expression of somatic cells in nematodes and mammals. These phenotypic complexities can be analyzed as 3-way interactions of gene, environment, and stochastic variations, the Tripartite Phenotype of Aging. Single-cell analyses provide tools to explore this broadening frontier of biogerontology.
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Affiliation(s)
- Caleb E Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA
- Dornsife College, University of Southern California, Los Angeles, CA
| | - Amin Haghani
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, CA
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18
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Haghani A, Feinberg JI, Lewis KC, Ladd-Acosta C, Johnson RG, Jaffe AE, Sioutas C, Finch CE, Campbell DB, Morgan TE, Volk HE. Cerebral cortex and blood transcriptome changes in mouse neonates prenatally exposed to air pollution particulate matter. J Neurodev Disord 2021; 13:30. [PMID: 34429070 PMCID: PMC8383458 DOI: 10.1186/s11689-021-09380-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 08/10/2021] [Indexed: 12/15/2022] Open
Abstract
Background Prenatal exposure to air pollutants is associated with increased risk for neurodevelopmental and neurodegenerative disorders. However, few studies have identified transcriptional changes related to air pollutant exposure. Methods RNA sequencing was used to examine transcriptomic changes in blood and cerebral cortex of three male and three female mouse neonates prenatally exposed to traffic-related nano-sized particulate matter (nPM) compared to three male and three female mouse neonates prenatally exposed to control filter air. Results We identified 19 nPM-associated differentially expressed genes (nPM-DEGs) in blood and 124 nPM-DEGs in cerebral cortex. The cerebral cortex transcriptional responses to nPM suggested neuroinflammation involvement, including CREB1, BDNF, and IFNγ genes. Both blood and brain tissues showed nPM transcriptional changes related to DNA damage, oxidative stress, and immune responses. Three blood nPM-DEGs showed a canonical correlation of 0.98 with 14 nPM-DEGS in the cerebral cortex, suggesting a convergence of gene expression changes in blood and cerebral cortex. Exploratory sex-stratified analyses suggested a higher number of nPM-DEGs in female cerebral cortex than male cerebral cortex. The sex-stratified analyses identified 2 nPM-DEGs (Rgl2 and Gm37534) shared between blood and cerebral cortex in a sex-dependent manner. Conclusions Our findings suggest that prenatal nPM exposure induces transcriptional changes in the cerebral cortex, some of which are also observed in blood. Further research is needed to replicate nPM-induced transcriptional changes with additional biologically relevant time points for brain development. Supplementary Information The online version contains supplementary material available at 10.1186/s11689-021-09380-3.
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Affiliation(s)
- Amin Haghani
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA.,Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Jason I Feinberg
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Wendy Klag Center for Autism and Developmental Disabilities, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Kristy C Lewis
- Department of Pediatrics and Human Development, Michigan State University, Grand Rapids, MI, USA
| | - Christine Ladd-Acosta
- Wendy Klag Center for Autism and Developmental Disabilities, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Richard G Johnson
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - Andrew E Jaffe
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Lieber Institute for Brain Development, Baltimore, MD, USA.,Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Center for Computational Biology, Johns Hopkins University, Baltimore, MD, USA.,Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - Constantinos Sioutas
- Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA
| | - Caleb E Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - Daniel B Campbell
- Department of Pediatrics and Human Development, Michigan State University, Grand Rapids, MI, USA
| | - Todd E Morgan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA.
| | - Heather E Volk
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Wendy Klag Center for Autism and Developmental Disabilities, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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19
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Liu Q, Shkirkova K, Lamorie-Foote K, Connor M, Patel A, Babadjouni R, Huuskonen M, Montagne A, Baertsch H, Zhang H, Chen JC, Mack WJ, Walcott BP, Zlokovic BV, Sioutas C, Morgan TE, Finch CE, Mack WJ. Air Pollution Particulate Matter Exposure and Chronic Cerebral Hypoperfusion and Measures of White Matter Injury in a Murine Model. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:87006. [PMID: 34424052 PMCID: PMC8382048 DOI: 10.1289/ehp8792] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 07/23/2021] [Accepted: 07/26/2021] [Indexed: 05/19/2023]
Abstract
BACKGROUND Exposure to ambient air pollution particulate matter (PM) is associated with increased risk of dementia and accelerated cognitive loss. Vascular contributions to cognitive impairment are well recognized. Chronic cerebral hypoperfusion (CCH) promotes neuroinflammation and blood-brain barrier weakening, which may augment neurotoxic effects of PM. OBJECTIVES This study examined interactions of nanoscale particulate matter (nPM; fine particulate matter with aerodynamic diameter ≤ 200 nm ) and CCH secondary to bilateral carotid artery stenosis (BCAS) in a murine model to produce white matter injury. Based on other air pollution interactions, we predicted synergies of nPM with BCAS. METHODS nPM was collected using a particle sampler near a Los Angeles, California, freeway. Mice were exposed to 10 wk of reaerosolized nPM or filtered air (FA) for 150 h. CCH was induced by BCAS surgery. Mice (C57BL/6J males) were randomized to four exposure paradigms: a) FA, b) nPM, c) FA + BCAS , and d) nPM + BCAS . Behavioral outcomes, white matter injury, glial cell activation, inflammation, and oxidative stress were assessed. RESULTS The joint nPM + BCAS group exhibited synergistic effects on white matter injury (2.3× the additive nPM and FA + BCAS scores) with greater loss of corpus callosum volume on T2 magnetic resonance imaging (MRI) (30% smaller than FA group). Histochemical analyses suggested potential microglial-specific inflammatory responses with synergistic effects on corpus callosum C5 immunofluorescent density and whole brain nitrate concentrations (2.1× and 3.9× the additive nPM and FA + BCAS effects, respectively) in the joint exposure group. Transcriptomic responses (RNA-Seq) showed greater impact of nPM + BCAS than individual additive effects, consistent with changes in proinflammatory pathways. Although nPM exposure alone did not alter working memory, the nPM + BCAS cohort demonstrated impaired working memory when compared to the FA + BCAS group. DISCUSSION Our data suggest that nPM and CCH contribute to white matter injury in a synergistic manner in a mouse model. Adverse neurological effects may be aggravated in a susceptible population exposed to air pollution. https://doi.org/10.1289/EHP8792.
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Affiliation(s)
- Qinghai Liu
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
| | - Kristina Shkirkova
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
| | - Krista Lamorie-Foote
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
| | - Michelle Connor
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Arati Patel
- Department of Neurological Surgery, University of California San Francisco School of Medicine, San Francisco, California, USA
| | - Robin Babadjouni
- Department of Neurological Surgery, Cedars-Sinai, Los Angeles, California, USA
| | - Mikko Huuskonen
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
- Department of Physiology and Neuroscience, University of Southern California, Los Angeles, California, USA
| | - Axel Montagne
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
- Department of Physiology and Neuroscience, University of Southern California, Los Angeles, California, USA
| | - Hans Baertsch
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
| | - Hongqiao Zhang
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - Jiu-Chiuan Chen
- Department of Preventative Medicine, University of Southern California, Keck School of Medicine, Los Angeles, California, USA
| | - Wendy J. Mack
- Department of Preventative Medicine, University of Southern California, Keck School of Medicine, Los Angeles, California, USA
| | - Brian P. Walcott
- Department of Neurosurgery, Northshore Neurological Institute, Evanston, Illinois, USA
| | - Berislav V. Zlokovic
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
- Department of Physiology and Neuroscience, University of Southern California, Los Angeles, California, USA
| | - Constantinos Sioutas
- Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California, USA
| | - Todd E. Morgan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - Caleb E. Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - William J. Mack
- Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, California, USA
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
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20
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Timosaponin alleviates oxidative stress in rats with high fat diet-induced obesity via activating Nrf2/HO-1 and inhibiting the NF-κB pathway. Eur J Pharmacol 2021; 909:174377. [PMID: 34302815 DOI: 10.1016/j.ejphar.2021.174377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/11/2021] [Accepted: 07/21/2021] [Indexed: 12/29/2022]
Abstract
Anemarrhena asphodeloides originated from the rhizome of Liliaceae Anemarrhena asphodeloides. One of the active pharmacological components of Anemarrhena asphodeloides is timosaponin (TSA), which reduces blood lipids and shows antioxidation and anti-inflammatory effects, but its mechanism is unclear. The objective of this study was to investigate the effect of TSA on oxidative stress induced by a long-term high-fat diet in obese rats. Body weight and the obesity index of the rats were measured during the experiment. Total antioxidant capacity (T-AOC), malondialdehyde (MDA), and glutathione peroxidase (GSH-Px) were used to detect oxidative stress indexes in serum and liver tissue. To observe the effect of TSA on the liver and adipose tissue of rats with oxidative stress, hematoxylin & eosin (H&E) staining was used. The p-NF-κB, NAD(P)H: quinone oxidoreductase 1 (NQO-1), Heme oxygenase 1 (HO-1), and Nrf2 in Nrf2/HO-1 and NF-κB pathways were assayed by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot. TSA was found to improve oxidative stress in obese rats by reducing MDA levels and increasing T-AOC and GSH-Px levels. Histological examination revealed that TSA effectively attenuated liver damage and improved obesity in rats. TSA was found to down-regulate the protein level of p-NF-κB and up-regulate the protein level of Nrf2/HO-1. These results suggested that TSA could effectively block inflammation and dyslipidemia in obese rats, thus improving oxidative stress, and its mechanism could be related to the Nrf2/HO-1 and NF-κB pathways.
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21
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22
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Patten KT, Valenzuela AE, Wallis C, Berg EL, Silverman JL, Bein KJ, Wexler AS, Lein PJ. The Effects of Chronic Exposure to Ambient Traffic-Related Air Pollution on Alzheimer's Disease Phenotypes in Wildtype and Genetically Predisposed Male and Female Rats. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:57005. [PMID: 33971107 PMCID: PMC8110309 DOI: 10.1289/ehp8905] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
BACKGROUND Epidemiological data link traffic-related air pollution (TRAP) to increased risk of Alzheimer's disease (AD). Preclinical data corroborating this association are largely from studies of male animals exposed acutely or subchronically to high levels of isolated fractions of TRAP. What remains unclear is whether chronic exposure to ambient TRAP modifies AD risk and the influence of sex on this interaction. OBJECTIVES This study sought to assess effects of chronic exposure to ambient TRAP on the time to onset and severity of AD phenotypes in a preclinical model and to determine whether sex or genetic susceptibility influences outcomes. METHODS Male and female TgF344-AD rats that express human AD risk genes and wildtype littermates were housed in a vivarium adjacent to a heavily trafficked tunnel in Northern California and exposed for up to 14 months to filtered air (FA) or TRAP drawn from the tunnel and delivered to animals unchanged in real time. Refractive particles in the brain and AD phenotypes were quantified in 3-, 6-, 10-, and 15-month-old animals using hyperspectral imaging, behavioral testing, and neuropathologic measures. RESULTS Particulate matter (PM) concentrations in TRAP exposure chambers fluctuated with traffic flow but remained below 24-h PM with aerodynamic diameter less than or equal to 2.5 micrometers (PM2.5) U.S. National Ambient Air Quality Standards limits. Ultrafine PM was a predominant component of TRAP. Nano-sized refractive particles were detected in the hippocampus of TRAP animals. TRAP-exposed animals had more amyloid plaque deposition, higher hyperphosphorylated tau levels, more neuronal cell loss, and greater cognitive deficits in an age-, genotype-, and sex-dependent manner. TRAP-exposed animals also had more microglial cell activation, but not astrogliosis. DISCUSSION These data demonstrate that chronic exposure to ambient TRAP promoted AD phenotypes in wildtype and genetically susceptible rats. TRAP effects varied according to age, sex, and genotype, suggesting that AD progression depends on complex interactions between environment and genetics. These findings suggest current PM2.5 regulations are insufficient to protect the aging brain. https://doi.org/10.1289/EHP8905.
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Affiliation(s)
- Kelley T. Patten
- Department of Molecular Biosciences, University of California Davis (UC Davis) School of Veterinary Medicine, Davis, California, USA
| | - Anthony E. Valenzuela
- Department of Molecular Biosciences, University of California Davis (UC Davis) School of Veterinary Medicine, Davis, California, USA
| | | | - Elizabeth L. Berg
- Department of Psychiatry and Behavioral Sciences, UC Davis School of Medicine, Sacramento, California, USA
| | - Jill L. Silverman
- Department of Psychiatry and Behavioral Sciences, UC Davis School of Medicine, Sacramento, California, USA
- The MIND Institute, UC Davis School of Medicine, Sacramento, California, USA
| | - Keith J. Bein
- Air Quality Research Center, UC Davis, Davis, California, USA
- Center for Health and the Environment, UC Davis, Davis, California, USA
| | - Anthony S. Wexler
- Air Quality Research Center, UC Davis, Davis, California, USA
- Mechanical and Aerospace Engineering, Civil and Environmental Engineering, and Land, Air and Water Resources, UC Davis, Davis, California, USA
| | - Pamela J. Lein
- Department of Molecular Biosciences, University of California Davis (UC Davis) School of Veterinary Medicine, Davis, California, USA
- The MIND Institute, UC Davis School of Medicine, Sacramento, California, USA
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23
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Haghani A, Thorwald M, Morgan TE, Finch CE. The APOE gene cluster responds to air pollution factors in mice with coordinated expression of genes that differs by age in humans. Alzheimers Dement 2020; 17:175-190. [PMID: 33215813 DOI: 10.1002/alz.12230] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 10/26/2020] [Accepted: 10/26/2020] [Indexed: 12/13/2022]
Abstract
Little is known of gene-environment interactions for Alzheimer's disease (AD) risk factors. Apolipoprotein E (APOE) and neighbors on chromosome 19q13.3 have variants associated with risks of AD, but with unknown mechanism. This study describes novel links among the APOE network, air pollution, and age-related diseases. Mice exposed to air pollution nano-sized particulate matter (nPM) had coordinate responses of Apoe-Apoc1-Tomm40 in the cerebral cortex. In humans, the AD vulnerable hippocampus and amygdala had stronger age decline in APOE cluster expression than the AD-resistant cerebellum and hypothalamus. Using consensus weighted gene co-expression network, we showed that APOE has a conserved co-expressed network in rodent and primate brains. SOX1, which has AD-associated single nucleotide polymorphisms, was among the co-expressed genes in the human hippocampus. Humans and mice shared 87% of potential binding sites for transcription factors in APOE cluster promoter, suggesting similar inducibility and a novel link among environment, APOE cluster, and risk of AD.
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Affiliation(s)
- Amin Haghani
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA.,Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Max Thorwald
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - Todd E Morgan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
| | - Caleb E Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA.,Dornsife College, University of Southern California, Los Angeles, California, USA
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