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Dunham SJB, Avelar‐Barragan J, Rothman JA, Adams ED, Faraci G, Forner S, Kawauchi S, Tenner AJ, Green KN, LaFerla FM, MacGregor GR, Mapstone M, Whiteson KL. Sex-specific associations between AD genotype and the microbiome of human amyloid beta knock-in (hAβ-KI) mice. Alzheimers Dement 2024; 20:4935-4950. [PMID: 38572865 PMCID: PMC11247698 DOI: 10.1002/alz.13794] [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: 10/24/2023] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 04/05/2024]
Abstract
INTRODUCTION Emerging evidence links changes in the gut microbiome to late-onset Alzheimer's disease (LOAD), necessitating examination of AD mouse models with consideration of the microbiome. METHODS We used shotgun metagenomics and untargeted metabolomics to study the human amyloid beta knock-in (hAβ-KI) murine model for LOAD compared to both wild-type (WT) mice and a model for early-onset AD (3xTg-AD). RESULTS Eighteen-month female (but not male) hAβ-KI microbiomes were distinct from WT microbiomes, with AD genotype accounting for 18% of the variance by permutational multivariate analysis of variance (PERMANOVA). Metabolomic diversity differences were observed in females, however no individual metabolites were differentially abundant. hAβ-KI mice microbiomes were distinguishable from 3xTg-AD animals (81% accuracy by random forest modeling), with separation primarily driven by Romboutsia ilealis and Turicibacter species. Microbiomes were highly cage specific, with cage assignment accounting for more than 40% of the PERMANOVA variance between the groups. DISCUSSION These findings highlight a sex-dependent variation in the microbiomes of hAβ-KI mice and underscore the importance of considering the microbiome when designing studies that use murine models for AD. HIGHLIGHTS Microbial diversity and the abundance of several species differed in human amyloid beta knock-in (hAβ-KI) females but not males. Correlations to Alzheimer's disease (AD) genotype were stronger for the microbiome than the metabolome. Microbiomes from hAβ-KI mice were distinct from 3xTg-AD mice. Cage effects accounted for most of the variance in the microbiome and metabolome.
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Affiliation(s)
- Sage J. B. Dunham
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
| | - Julio Avelar‐Barragan
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
| | - Jason A. Rothman
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
| | - Eric D. Adams
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
| | - Gina Faraci
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
| | - Stefania Forner
- Institute for Memory Impairments and Neurological Disorders (UCI MIND)University of California IrvineIrvineCaliforniaUSA
| | - Shimako Kawauchi
- Department of Anatomy and NeurobiologyDevelopmental Biology CenterUniversity of California IrvineCollege of MedicineIrvineCaliforniaUSA
| | - Andrea J. Tenner
- Department of Molecular Biology & BiochemistryDepartment of Neurobiology and BehaviorDepartment of Pathology and Laboratory MedicineSchool of MedicineInstitute for Memory Impairments and Neurological Disorders (UCI MIND)University of California IrvineIrvineCaliforniaUSA
| | - Kim N. Green
- Institute for Memory Impairments and Neurological Disorders (UCI MIND), Department of Neurobiology and BehaviorSchool of Biological SciencesCenter for Neural Circuit MappingUniversity of California IrvineIrvineCaliforniaUSA
| | - Frank M. LaFerla
- Institute for Memory Impairments and Neurological Disorders (UCI MIND)Department of Neurobiology and BehaviorUniversity of California IrvineIrvineCaliforniaUSA
| | - Grant R. MacGregor
- Department of Developmental and Cell BiologyUniversity of California IrvineIrvineCaliforniaUSA
| | - Mark Mapstone
- Department of NeurologyUniversity of California IrvineIrvineCaliforniaUSA
| | - Katrine L. Whiteson
- Department of Molecular Biology & BiochemistryUniversity of California IrvineIrvineCaliforniaUSA
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Burger NFV, Nicolis VF, Botha AM. Host-specific co-evolution likely driven by diet in Buchnera aphidicola. BMC Genomics 2024; 25:153. [PMID: 38326788 PMCID: PMC10851558 DOI: 10.1186/s12864-024-10045-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 01/24/2024] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND Russian wheat aphid (Diuraphis noxia Kurd.) is a severe pest to wheat, and even though resistance varieties are available to curb this pest, they are becoming obsolete with the development of new virulent aphid populations. Unlike many other aphids, D noxia only harbours a single endosymbiont, Buchnera aphidicola. Considering the importance of Buchnera, this study aimed to elucidate commonalities and dissimilarities between various hosts, to better understand its distinctiveness within its symbiotic relationship with D. noxia. To do so, the genome of the D. noxia's Buchnera was assembled and compared to those of other aphid species that feed on diverse host species. RESULTS The overall importance of several features such as gene length and percentage GC content was found to be critical for the maintenance of Buchnera genes when compared to their closest free-living relative, Escherichia coli. Buchnera protein coding genes were found to have percentage GC contents that tended towards a mean of ~ 26% which had strong correlation to their identity to their E. coli homologs. Several SNPs were identified between different aphid populations and multiple isolates of Buchnera were confirmed in single aphids. CONCLUSIONS Establishing the strong correlation of percentage GC content of protein coding genes and gene identity will allow for identifying which genes will be lost in the continually shrinking Buchnera genome. This is also the first report of a parthenogenically reproducing aphid that hosts multiple Buchnera strains in a single aphid, raising questions regarding the benefits of maintaining multiple strains. We also found preliminary evidence for post-transcriptional regulation of Buchnera genes in the form of polyadenylation.
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Affiliation(s)
- N Francois V Burger
- Department of Genetics, University of Stellenbosch, Stellenbosch, 7601, South Africa
| | - Vittorio F Nicolis
- Department of Genetics, University of Stellenbosch, Stellenbosch, 7601, South Africa
| | - Anna-Maria Botha
- Department of Genetics, University of Stellenbosch, Stellenbosch, 7601, South Africa.
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Yu W, Bosquée E, Fan J, Liu Y, Bragard C, Francis F, Chen J. Proteomic and Transcriptomic Analysis for Identification of Endosymbiotic Bacteria Associated with BYDV Transmission Efficiency by Sitobion miscanthi. PLANTS (BASEL, SWITZERLAND) 2022; 11:3352. [PMID: 36501390 PMCID: PMC9735544 DOI: 10.3390/plants11233352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/27/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Sitobion miscanthi, an important viral vector of barley yellow dwarf virus (BYDV), is also symbiotically associated with endosymbionts, but little is known about the interactions between endosymbionts, aphid and BYDV. Therefore, two aphids' geographic populations, differing in their BYDV transmission efficiency, after characterizing their endosymbionts, were treated with antibiotics to investigate how changes in the composition of their endosymbiont population affected BYDV transmission efficiency. After antibiotic treatment, Rickettsia was eliminated from two geographic populations. BYDV transmission efficiency by STY geographic population dropped significantly, by -44.2% with ampicillin and -25.01% with rifampicin, but HDZ geographic population decreased by only 14.19% with ampicillin and 23.88% with rifampicin. Transcriptomic analysis showed that the number of DEGs related to the immune system, carbohydrate metabolism and lipid metabolism did increase in the STY rifampicin treatment, while replication and repair, glycan biosynthesis and metabolism increased in the STY ampicillin treatment. Proteomic analysis showed that the abundance of symbionin symL, nascent polypeptide-associated complex subunit alpha and proteasome differed significantly between the two geographic populations. We found that the endosymbionts can mediate vector viral transmission. They should therefore be included in investigations into aphid-virus interactions and plant disease epidemiology. Our findings should also help with the development of strategies to prevent virus transmission.
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Affiliation(s)
- Wenjuan Yu
- MOA Key Laboratory of Integrated Management of Pests on Crops in Southwest China, Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés 2, 5030 Gembloux, Belgium
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Emilie Bosquée
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés 2, 5030 Gembloux, Belgium
| | - Jia Fan
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yong Liu
- College of Plant Protection, Shandong Agricultural University, Tai’an 271018, China
| | - Claude Bragard
- Applied Microbiologye-Phytopathology, Earth and Life Institute, UCLouvain, Croix du Sud L7.05.03, 1348 Louvain-la-Neuve, Belgium
| | - Frédéric Francis
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Passage des Déportés 2, 5030 Gembloux, Belgium
| | - Julian Chen
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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Thomas GH. Microbial Musings - Autumn 2022. MICROBIOLOGY (READING, ENGLAND) 2022; 168. [PMID: 36748692 DOI: 10.1099/mic.0.001291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Gavin H Thomas
- Department of Biology, University of York, Heslington, UK
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