Gut microbiota of patients with Parkinson’s disease and healthy volunteers was analyzed by the method of high throughput 16S rRNA sequencing of bacterial genomes. In patients with Parkinson’s ...diseases, changes in the content of 9 genera and 15 species of microorganisms were revealed: reduced content of
Dorea
,
Bacteroides
,
Prevotella
,
Faecalibacterium
,
Bacteroides massiliensis
,
Stoquefichus massiliensis
,
Bacteroides coprocola
,
Blautia glucerasea
,
Dorea longicatena
,
Bacteroides dorei
,
Bacteroides plebeus
,
Prevotella copri
,
Coprococcus eutactus
, and
Ruminococcus callidus
, and increased content of
Christensenella
,
Catabacter
,
Lactobacillus
,
Oscillospira
,
Bifidobacterium
,
Christensenella minuta
,
Catabacter hongkongensis
,
Lactobacillus mucosae
,
Ruminococcus bromii
, and
Papillibacter cinnamivorans
. This microbiological pattern of gut microflora can trigger local inflammation followed by aggregation of α-synuclein and generation of Lewy bodies.
Genetic methods in honey bee breeding Kaskinova, M D; Salikhova, A M; Gaifullina, L R ...
Vavilovskiĭ zhurnal genetiki i selekt͡s︡ii,
07/2023, Letnik:
27, Številka:
4
Journal Article
Recenzirano
Odprti dostop
The honey bee Apis mellifera is a rather difficult object for selection due to the peculiarities of its biology. Breeding activities in beekeeping are aimed at obtaining bee colonies with high rates ...of economically useful traits, such as productivity, resistance to low temperatures and diseases, hygienic behavior, oviposition of the queen, etc. With two apiaries specializing in the breeding of A. m. mellifera and A. m. carnica as examples, the application of genetic methods in the selection of honey bees is considered. The first stage of the work was subspecies identification based on the analysis of the polymorphism of the intergenic mtDNA locus tRNAleu-COII (or COI-COII) and microsatellite nuclear DNA loci Ap243, 4a110, A24, A8, A43, A113, A88, Ap049, A28. This analysis confirmed that the studied colonies correspond to the declared subspecies. In the apiary with A. m. mellifera, hybrid colonies have been identified. A method based on the analysis of polymorphisms of the tRNAleu-COII locus and microsatellite nuclear DNA loci has been developed to identify the dark forest bee A. m. mellifera and does not allow one to differentiate subspecies from C (A. m. carnica and A. m. ligustica) and O (A. m. caucasica) evolutionary lineages from each other. The second stage was the assessment of the allelic diversity of the csd gene. In the apiary containing colonies of A. m. mellifera (N = 15), 20 csd alleles were identified. In the apiary containing colonies of A. m. carnica (N = 44), 41 alleles were identified. Six alleles are shared by both apiaries. DNA diagnostics of bee diseases showed that the studied colonies are healthy. Based on the data obtained, a scheme was developed for obtaining primary material for honey bee breeding, which can subsequently be subjected to selection according to economically useful traits. In addition, the annual assessment of the allelic diversity of the csd gene will shed light on the frequency of formation of new allelic variants and other issues related to the evolution of this gene.
In the mid-20th century, the first case of infection of European bees Apis mellifera L. with the ectoparasite mite Varroa destructor was recorded. The original host of this mite is the Asian bee Apis ...cerana. The mite V. destructor was widespread throughout Europe, North and South America, and Australia remained the only continent free from this parasite. Without acaricide treatment any honeybee colony dies within 1-4 years. The use of synthetic acaricides has not justified itself - they make beekeeping products unsuitable and mites develop resistance to them, which forces the use of even greater concentrations that can be toxic to the bees. Therefore, the only safe measure to combat the mite is the use of biological control methods. One of these methods is the selection of bee colonies with natural mite resistance. In this article we summarize publications devoted to the search for genetic markers associated with resistance to V. destructor. The first part discusses the basic mechanisms of bee resistance (Varroa sensitive hygienic behavior and grooming) and methods for their assessment. The second part focuses on research aimed at searching for loci and candidate genes associated with resistance to varroosis by mapping quantitative traits loci and genome-wide association studies. The third part summarizes studies of the transcriptome profile of Varroa resistant bees. The last part discusses the most likely candidate genes - potential markers for breeding Varroa resistant bees. Resistance to the mite is manifested in a variety of phenotypes and is under polygenic control. The establishing of gene pathways involved in resistance to Varroa will help create a methodological basis for the selection of Varroa resistant honeybee colonies.
—
Planctomycetes are a phylogenetic group of bacteria with complex cell organization, large genomes and a wide spectrum of genome-encoded secondary metabolites. As suggested by analysis of available ...planctomycete genomes, these bacteria represent a promising source of potentially novel biologically active compounds. The number of cultured planctomycetes, however, remains limited. This study was undertaken in order to assess the presence of antimicrobial activity and its spectrum in the recently described freshwater planctomycete
Lacipirellula parvula
PX69
T
representing the novel family
Lacipirellulaceae
. The genome of strain PX69
T
contained 6 gene clusters encoding type III polyketide synthases, non-ribosomal peptide synthetases, and other secondary metabolites, which displayed low similarity to those in other bacteria. Strain PX69
T
was shown to exhibit antimicrobial activity against a number of test microorganisms. The highest antimicrobial activity, up to 83‒87% of growth inhibition, was observed against
Staphylococcus aureus
and
Candida albicans.
The medium composition and the cultivation time have been optimized in order to maximize antimicrobial activity of strain PX69
T
.
Relevance
. In a pandemic, studies on the duration of immunity in those who have recovered from COVID-19 and the formation of resistance to a new coronavirus infection are of particular importance.
...Target
. To study the retention time of IgG in the blood serum of employees of a medical institution who recovered from a new coronavirus infection COVID-19.
Materials and methods
. The assessment of the timing of the formation of IgG was first carried out 3 weeks after the illness in employees of The National Medical Research Center for Otorhinolaryngology from April 2020 to December 2020. Further, the intervals for blood sampling to study the dynamics of antibodies to coronavirus infection were 3–4 weeks (9 blood samples for each ). Antibodies were examined by ELISA; immunological method for determining IgG (test system – "Vector Best", semi-quantitative analysis). Statistical processing of the study results was carried out using the SPSS-22 statistical software package and the OpenEpiver statistical calculator. 3.
Results and discussion
. The proportion of employees of a medical institution who recovered from COVID-19 was 39%, among them persons aged 36 to 55 years prevailed. It was found that class G immunoglobulins persist from seven months or more in 56.3% of those participating in the observation (the positivity coefficient is much higher than 1.2), in about 12.7% of those who had been ill, IgG in the blood serum persisted for about six months, in 11, 3% about three months. There were no statistically significant differences in the duration of immunity between men and women.
Conclusion
. A statistically significant direct relationship was found between age and the duration of immunity.
—
The effect of chitosan (200 kD, 75% deacetylation) on
Nosema apis
development in bee colonies during wintering was investigated. The conditions for development of the nosematous infection were ...analyzed. According to the results of determination of PCR products specific for
N. apis,
chitosan decreased significantly the degree of infection of individual bees with
N. apis
spores. The scheme of stimulation of the bee immune system by chitosan via the changes in the level of antimicrobial peptides and proteins of the macroorganism antioxidant systems is discussed. Due to a decrease in the degree of infection with
N. apis
, survival of the bees increased during the long winter period.
High-molecular weight chitosan (200 kDa, 75% deacetylated) and N-succinoyl chitosan (300 kDa, 75% deacetylated) were shown to have a preadaptive effect and increase the lifespan of honeybees due to ...the induction of protective antioxidant and immune mechanisms. Chitosan with a molecular weight of 200 kDa had a fungistatic effect on a pathogenic fungus that causes ascospherosis, a disease of bee larvae and pupae.
The result of comparative study of oropharyngeal microbiota taxonomic composition in patients with different severity level of bronchial asthma (BA) and chronic obstructive pulmonary disease (COPD) ...is presented in this paper.
To compare oropharyngeal microbiota composition in case of bronchial asthma and chronic obstructive pulmonary disease in different severity levels.
138 patients, 50 with BA and 88 with COPD were studied. For each patient was collected anamnesis vitae, swab from the back of the throat and performed physical examination. High-throughput 16S ribosomal RNA gene sequencing and bioinformatic analysis was employed to characterize the microbial communities.
As a result of the study wasfound a number of differences on various taxonomic levels in microbiota's composition within group of patients with different severity level of BA and group of patients with different severity level of COPD and between those groups. COPD patients with GOLD 1-2 in comparison with GOLD 3-4 patiens are marked by prevalence of species Brevibacterium aureum, genus Scardovia, Coprococcus, Haemophilus, Moryella, Dialister, Paludibacter and decrease of Prevotella melaninogenica species. BA patients with severe uncontrolled asthma in comparison with patients which have mild persistent asthma are marked by decrease of Prevotella and increase of species Bifidobacterium longum, Prevotella nanceiensis, Neisseria cinerea, Aggregatibacter segnis and genus Odoribacter, Alloiococcus, Lactobacillus, Megasphaera, Parvimonas, Sneathia. Patient's microbiota in BA group in comparison with COPD group is characterized by the prevalence of Prevotella melaninogenica and genus Selenomonas, Granulicatella u Gemella, and decrease of Prevotella nigrescens, Haemophilus influenza and genus Aggregatibacter, Alloiococcus, Catonella, Mycoplasma, Peptoniphilus u Sediminibacterium. There are no differences between microbiota composition in case of severe uncontrolled BA and very severe COPD.
Lack of differences in oropharyngeal microbiota taxonomic composition between patients with severe uncontrolled BA and very severe COPD allow us to suggest a similarity of bronchopulmonary system condition in case of diseases' severe stages.
We analyzed samples of bees from three districts of the Republic of Bashkortostan, including samples from protected natural areas, selected with an interval of 6–8 years to assess changes in their ...genetic structure. The polymorphism of the intergenic region
COI-COII
of mitochondrial DNA and nine SSR loci of nuclear DNA was analyzed. In the
Apis mellifera mellifera
population from a protected natural area, the introgression of the gene pool of subspecies from the evolutionary lineage C was revealed. The results allow us to propose measures to limit the import of bee colonies from the evolutionary lineage C.
Currently the role of microbiota in diseases pathogenesis, its therapeutic and diagnostic potential are of the utmost interest for scientists and medical doctors. Parkinson’s disease is ...neurodegenerative disorder for which microbiota’s dysbiosis was previously shown.The main goal of the study is to compare the colon microbiota composition in case of Parkinson’s disease and other neurological pathologies, including idiopathic familial dystonia, essential tremor, multiple sclerosis, multiple system atrophy in order to determine the intestinal flora landscape specific to Parkinson’s disease.Material and methods. One hundred twenty-six patients, 93 with Parkinson’s disease and 33 with other neurological pathology were examined. For all patients, physical examination and fecal samples collection were performed. Microbiota taxonomic composition was analyzed by sequencing of bacterial 16S rRNA genes followed by bioinformatic and statistical analysis.As a result of the study, significant differences between groups in microbiota composition were found. Gut microbiota of patients with Parkinson’s disease was characterized by increase of Desulfovibrio piger, Lactobacillus mucosae, Yokenella regensburgei, Alistipes indistinctus, Oscillospira capillosus, Clostridium bolteae, Soleaferrea massiliensis, Butyricimonas virosa, Dorea massiliensis, Victivallis vadensis abundances. Patients with other neurological diseases had increased levels of bacteria belonging to Blautia, Intestinibacter, Coprococcus genera and Anoxystipes fissicatena, Fusobacterium periodonticum, Gemmiger formicilis, Papillibacter cinnamivorans, Roseburia faecis, Lachnoclostridium indolis, Clostridium populeti, Clostridium tertium, Roseburia intestinalis, Eubacterium desmolans, Eubacterium cylindroides, Clostridium clariflavum, Eubacterium eligens, Coprococcus eutactus, Intestinibacter bartlettii species in their gut microbiota.Consequently, gut microbiota in case of Parkinson’s disease was different from the microbiota of patients with other neurological diseases, including neuroinflammatory and neurodegenerative disorders, in terms of taxonomic diversity and composition.
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