Abstract:
:Mixed strain infection (MSI) refers to the concurrent infection of a susceptible host with multiple strains of a single pathogenic species. Known to occur in humans and animals, MSIs deserve special consideration when studying transmission dynamics, evolution, and treatment of mycobacterial diseases, notably tuberculosis in humans and paratuberculosis (or Johne's disease) in ruminants. Therefore, a systematic review was conducted to examine how MSIs are defined in the literature, how widespread the phenomenon is across the host species spectrum, and to document common methods used to detect such infections. Our search strategy identified 121 articles reporting MSIs in both humans and animals, the majority (78.5%) of which involved members of the Mycobacterium tuberculosis complex, while only a few (21.5%) examined non-tuberculous mycobacteria (NTM). In addition, MSIs exist across various host species, but most reports focused on humans due to the extensive amount of work done on tuberculosis. We reviewed the strain typing methods that allowed for MSI detection and found a few that were commonly employed but were associated with specific challenges. Our review notes the need for standardization, as some highly discriminatory methods are not adapted to distinguish between microevolution of one strain and concurrent infection with multiple strains. Further research is also warranted to examine the prevalence of NTM MSIs in both humans and animals. In addition, it is envisioned that the accurate identification and a better understanding of the distribution of MSIs in the future will lead to important information on the epidemiology and pathophysiology of mycobacterial diseases.
journal_name
Front Genetjournal_title
Frontiers in geneticsauthors
Byrne AS,Goudreau A,Bissonnette N,Shamputa IC,Tahlan Kdoi
10.3389/fgene.2020.600692subject
Has Abstractpub_date
2020-12-21 00:00:00pages
600692issn
1664-8021journal_volume
11pub_type
abstract::Innate immune response is triggered by pathogen components, like lipopolysaccharides (LPS) of gram-negative bacteria. LPS initiates Toll-like receptor 4 (TLR4) signaling, which involves mitogen activated protein kinases (MAPK) and nuclear factor kappa B (NFκB) in different pathway branches and ultimately induces infla...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2019.00031
更新日期:2019-02-04 00:00:00
abstract::There is a paradigm shift from the traditional focus on the "average" individual towards the definition and analysis of trait variation within individual life-history and among individuals in populations. This is a result of increasing availability of individual phenotypic data. The shift allows the use of genetic and...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.00727
更新日期:2019-09-20 00:00:00
abstract::Pathway analysis is a powerful method for data analysis in genomics, most often applied to gene expression analysis. It is also promising for single-nucleotide polymorphism (SNP) data analysis, such as genome-wide association study data, because it allows the interpretation of variants with respect to the biological p...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2017.00174
更新日期:2017-11-07 00:00:00
abstract:OBJECTIVES:Using a novel candidate SNP approach, we aimed to identify a possible genetic basis for the higher glioma incidence in Whites relative to East Asians and African-Americans. METHODS: We hypothesized that genetic regions containing SNPs with extreme differences in allele frequencies across ethnicities are mo...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2012.00203
更新日期:2012-10-12 00:00:00
abstract::Cancer has been a major public health problem worldwide for many centuries. Cancer is a complex disease associated with accumulative genetic mutations, epigenetic aberrations, chromosomal instability, and expression alteration. Increasing lines of evidence suggest that many non-coding transcripts, which are termed as ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.598773
更新日期:2020-12-16 00:00:00
abstract::Ionizing radiation (IR) is a high-energy radiation whose biological effects depend on the irradiation doses. Low-dose radiation (LDR) is delivered during medical diagnoses or by an exposure to radioactive elements and has been linked to the occurrence of chronic diseases, such as leukemia and cardiovascular diseases. ...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2020.566244
更新日期:2020-10-02 00:00:00
abstract::Respiratory burst oxidase homologs (Rbohs) play a predominant role in reactive oxygen species (ROS) production, which is crucial in plant growth, differentiation, as well as their responses to biotic and abiotic stresses. To date, however, there is little knowledge about the function of cotton Rboh genes. Here, we ide...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00788
更新日期:2020-09-11 00:00:00
abstract::Since its emergence, CRISPR/Cas9-mediated base editors (BEs) with cytosine deaminase activity have been used to precisely and efficiently introduce single-base mutations in genomes, including those of human cells, mice, and crop species. Most production traits in livestock are induced by point mutations, and genome ed...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.00215
更新日期:2019-03-15 00:00:00
abstract::Expanded newborn screening for inborn errors of metabolism (IEMs) by tandem mass spectrometry (MS/MS) could simultaneously analyze more than 40 metabolites and identify about 50 kinds of IEMs. Next generation sequencing (NGS) targeting hundreds of IMEs-associated genes as a follow-up test in expanded newborn screening...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.01052
更新日期:2019-10-29 00:00:00
abstract::Inference of absolute copy numbers in tumor genomes is one of the key points in the study of tumor genesis. However, the mixture of tumor and normal cells poses a big challenge to this task. Accurate estimation of tumor purity (i.e., the fraction of tumor cells) is a necessary step to solve this problem. In this paper...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00458
更新日期:2020-04-30 00:00:00
abstract::For the past several decades, research in understanding the molecular basis of human muscle aging has progressed significantly. However, the development of accessible tissue-specific biomarkers of human muscle aging that may be measured to evaluate the effectiveness of therapeutic interventions is still a major challe...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00242
更新日期:2018-07-12 00:00:00
abstract::Recent population declines to the high elevation western North America foundation species whitebark pine, have been driven by the synergistic effects of the invasive blister rust pathogen, mountain pine beetle (MPB), fire exclusion, and climate change. This has led to consideration for listing whitebark pine (WBP) as ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2017.00009
更新日期:2017-02-10 00:00:00
abstract::The Galápagos Islands are known to have experienced significant drought during the Quaternary. The loss of mesophytic upland habitats has been suggested to underlie the relatively lower endemism of upland compared with lowland plant assemblages. A fossil pollen record spanning the last 26,000 years from an upland bog ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2013.00269
更新日期:2013-12-03 00:00:00
abstract::Bovine leukemia virus (BLV) affects cattle health and productivity worldwide, causing abnormal immune function and immunosuppression. Transfer RNA fragments (tRFs) are known to be involved in inhibition of gene expression and have been associated with stress and immune response, tumor growth, and viral infection. The ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2018.00236
更新日期:2018-07-04 00:00:00
abstract::Genome-wide association study (GWAS), exploring the historical and evolutionary recombinations at the population level, is a major method adopted to identify quantitative trait loci (QTL) for complex traits. However, to summarize GWAS results, gene structure, and linkage disequilibrium (LD) in a single view, multiple ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.00260
更新日期:2020-03-20 00:00:00
abstract::As a conserved protein family, WRKY has been shown to be involved in multiple biological processes in plants. However, the mechanism of functional diversity for WRKYs in pepper has not been well elucidated. Here, a total of 223 WRKY members from solanaceae crops including pepper, tomato and potato, were analyzed using...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2019.00492
更新日期:2019-05-28 00:00:00
abstract::Gene copy-number differences due to gene duplications and deletions are rampant in natural populations and play a crucial role in the evolution of genome complexity. Per-locus analyses of gene duplication rates in the pre-genomic era revealed that gene duplication rates are much higher than the per nucleotide substitu...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2013.00273
更新日期:2013-12-10 00:00:00
abstract::Variability of the comet assay is a serious issue, whether it occurs from experiment to experiment in the same laboratory, or between different laboratories analysing identical samples. Do we have to live with high variability, just because the comet assay is a biological assay rather than analytical chemistry? Numero...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2014.00359
更新日期:2014-10-20 00:00:00
abstract::The availability of massive amounts of DNA sequence data, from 1000s of genomes even in a single project has had a huge impact on our understanding of biology, but also creates several problems for biologists carrying out those experiments. Bioinformatic analysis of sequence data is perhaps the most obvious challenge ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2014.00031
更新日期:2014-02-20 00:00:00
abstract::Pathogenic microorganism analysis based on next-generation sequencing technology is an important tool for clinical diagnosis, public health surveillance, and outbreak investigation. However, scientific researchers without the relevant background lack the time, training, or infrastructure to use large data sets or inst...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.01007
更新日期:2020-08-31 00:00:00
abstract::This study tests in a genetically informative design whether exercise behavior causally influences subjective wellbeing (SWB) and internalizing problems (INT). If exercise causally influences SWB and INT, genetic and environmental factors influencing exercise behavior will also influence SWB and INT. Furthermore, with...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2012.00004
更新日期:2012-01-19 00:00:00
abstract:UNLABELLED:The PIMMS (Pragmatic Insertional Mutation Mapping System) pipeline has been developed for simple conditionally essential genome discovery experiments in bacteria. Capable of using raw sequence data files alongside a FASTA sequence of the reference genome and GFF file, PIMMS will generate a tabulated output o...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2015.00139
更新日期:2015-04-09 00:00:00
abstract::Mutations in mitochondrial (mt) DNA determine important human diseases. The majority of the known pathogenic mutations are located in transfer RNA (tRNA) genes and are responsible for a wide range of currently untreatable disorders. Experimental evidence both in yeast and in human cells has shown that the detrimental ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2015.00113
更新日期:2015-03-23 00:00:00
abstract::Recent work shows strong evidence of ancestry-based assortative mating in spouse pairs of the older generation of the Framingham Heart Study. Here, we extend this analysis to two studies of human longevity: the Long Life Family Study (LLFS), and the New England Centenarian Study (NECS). In the LLFS, we identified 890 ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2017.00186
更新日期:2017-11-21 00:00:00
abstract::The codon redundancy ("degeneracy") found in protein-coding regions of mRNA also prescribes Translational Pausing (TP). When coupled with the appropriate interpreters, multiple meanings and functions are programmed into the same sequence of configurable switch-settings. This additional layer of Ontological Prescriptiv...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2014.00140
更新日期:2014-05-20 00:00:00
abstract::Telomeres are essential nucleoprotein structures at linear chromosomes that maintain genome integrity by protecting chromosome ends from being recognized and processed as damaged DNA. In addition, they limit the cell's proliferative capacity, as progressive loss of telomeric DNA during successive rounds of cell divisi...
journal_title:Frontiers in genetics
pub_type: 杂志文章,评审
doi:10.3389/fgene.2017.00067
更新日期:2017-05-23 00:00:00
abstract::The effective population size over time (demographic history) can be retraced from a sample of contemporary DNA sequences. In this paper, we propose a novel methodology based on importance sampling (IS) for exploring such demographic histories. Our starting point is the generalized skyline plot with the main differenc...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2015.00259
更新日期:2015-08-07 00:00:00
abstract::Colon cancer has the third highest incidence and mortality among cancers in the United States. MicroRNA-21 (miR21) has been described as an oncomir that is highly overexpressed in tumor tissue from colorectal cancer. Recent studies showed that silencing of miR21 through use of a miR21 inhibitor (anti-miR21) affected v...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2013.00301
更新日期:2014-01-02 00:00:00
abstract::Pharmacogenomics is the study of how genes affect a person's response to drugs. Thus, understanding the effect of drug at the molecular level can be helpful in both drug discovery and personalized medicine. Over the years, transcriptome data upon drug treatment has been collected and several databases compiled before ...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2020.564792
更新日期:2020-11-12 00:00:00
abstract::Periconceptional folic acid use can often prevent neural tube defects (NTDs). Variants of genes involved in folate metabolism in mothers and children have been associated with occurrence of NTDs. We identified Irish families with individuals affected by neural tube defects. In these families, we observed that neural t...
journal_title:Frontiers in genetics
pub_type: 杂志文章
doi:10.3389/fgene.2013.00223
更新日期:2013-11-06 00:00:00