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Microsatellite - Springer Nature

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Last Updated: 05 August 2022

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Microsatellite instability in patients with hepato-biliary-pancreatic malignancies in clinical practice (KHBO 1903)

Introduction This study was designed to determine the prevalence of microsatellite instability, as well as the clinical characteristics and therapeutic results of pesolizumab in patients with MSI-high cancers. There were 13 patients with MSI overdose, including eight patients receiving pemozumab therapy. MSI-high was found in 13 of the 283 patients with hepato-biliary-pancreatic malignancies. Lynch syndrome was not present in any of these 13 patients. In three patients, a partial response in one patient, and stable disease in three patients were observed. There was a 50% response rate to peolizumab therapy for MSI-high cancers. The assessment of MSI status by the new procedure using properly prepared tissue samples was expected to be both a quick and accurate way to determine MSI status and estimation of petholizumab's effectiveness.

Source link: https://doi.org/10.1007/s10147-022-02187-9


Development of microsatellite markers for the Japanese orange fly, Bactrocera tsuneonis (Diptera: Tephritidae)

It is vital to know the dispersal ability of the Japanese orange fly Bactrocera tsuneons in order to monitor and control the tsuneonis. We therefore used microsatellite markers at 17 loci for B. tsuneonis to determine the species's genetic structure. The microsatellite markers were used to determine polymorphism analysis in the eastern portion of Japan's Oita and Yamada Prefectures randomly collected adult females and males from abandoned orchards. The average number of alleles for the 17 loci, in which two loci did not show polymorphism, was 2. 65 for the 17 loci. The null allele frequencies varies among populations. Females and males of the same population were not identified when the Oita and Yamachi populations were not observed, but between females and males of the same population was not observed, although it was observed between the Oita and Yamachi populations. These markers can be used for population control and to extend the geographic distribution of this species, possibly contributing to B. tsuneonis pest control.

Source link: https://doi.org/10.1007/s13355-022-00783-9


Microsatellite loci reveal distinct populations with high diversity for the pathogenic fungus Pseudocercospora ulei from North-Western Amazonia

The Ascomycota fungus Pseudocercospora ulei caused the leaf Blight in South America. We found a high genetic diversity in P. ulei populations. Although there is no evidence showing that sexual reproduction is present in Caquet's P. ulei populations, our results show that genetic recombination is occurring, to a certain degree, as well as other Pseudocercospora species. Our results support the belief that although asexual conidia are responsible for plant propagation within plantations, ascospores are involved in the establishment of P. ulei populations. In addition, population structure for both clone-corrected and non-clone-corrected results indicates that climate conditions could be contributing to P. ulei diversification. This is the first characterization of P. ulei populations in Colombia, and, thereby, will provide important data for the region's H. brasiliensis resistance improvement program.

Source link: https://doi.org/10.1007/s10658-022-02520-y


Fast and accurate population admixture inference from genotype data from a few microsatellites to millions of SNPs

Using marker genotype data, population-based and non-model-based techniques were developed to identify populations and assign individuals to the identified populations. However, new model-based approaches are computationally demanding and therefore applicable to small problems, only to small ones, or use simplified admixture schemes that could produce inaccurate results in difficult situations such as unbalanced sampling. Using genotype data from a few multiallelic microsatellites to millions of diallelic SNPs, I find new likelihood models for fast and accurate population admixture estimation in this article. The methods include first a coarse-grained population analysis by using the mixture model and the simulated annealing algorithm, followed by an admixture analysis of fine-grained population structure by using the clustering results as a starting point in a goal maximization scheme using the clustering results. Both qualitative and empirical results show that the latest methods compare favorably with existing strategies in terms of accuracy and running speed. Extensive reviews of both simulated and empirical results show that the new techniques perform well with existing methods in both accuracy and running speed.

Source link: https://doi.org/10.1038/s41437-022-00535-z


Development of microsatellites markers for the deep coral Madracis myriaster (Pocilloporidae: Anthozoa)

Colombia took the first Deep Corals National Park in 2013, marking a significant step toward the establishment and management of Marine Protected Areas. M. myriaster's newest genetic markers were tested in PNNCP samples in order to enhance the study of deep-sea coral habitats, their connectivity, and prospective management.

Source link: https://doi.org/10.1038/s41598-022-14322-7


Contrasting mtDNA and microsatellite data of great reed warbler Acrocephalus arundinaceus breeding populations on a small geographic scale

Our objectives were to determine whether or not European-scale pattern is apparent or not on a small scale within Hungary's borders, as well as compare the results obtained with mtDNA sequencing and microsatellite markers to see whether or not the pattern is evident or not on a small scale. Both tests were performed on 36 birds to determine genetic variation, and the mtDNA control region II was sequenced in 68 adult breeding birds and 51 were fingerprinted at 11 microsatellite loci. However, in the case of an intermixing population, larger-scale experiments are required. Only reliable results are obtained when a geographical and ecological factor plays a role in population division, not least because a human and environmental factor influences the population division.

Source link: https://doi.org/10.1007/s42977-022-00127-2


Association between c-type lectin-like receptor 2 and microsatellite instability in colorectal cancer: a cross-sectional study

Activated platelets play a role in the regulation of innate immune cells. Patients with different microsatellite statuses have different immune profiles. This study was designed to investigate the association of plasma CLEC-2 levels with microsatellite status in colorectal cancer patients. Methods A cross-sectional review of 430 CRC patients from Harbin Medical University Cancer Hospital was conducted. With fasting venous blood samples obtained from each participant before any treatment, CLEC-2 levels were determined. adjusting for other confounding variables, CLEC-2 levels were much higher among patients with elevated microsatellite instability phenotype than the stable microsatellite group.

Source link: https://doi.org/10.1186/s12885-022-09834-4


Microsatellite instability in the high-grade dysplasia component of duodenal adenoma is associated with progression to adenocarcinoma

3 adenocarcinoma cases demonstrated microsatellite instability, while the remaining 49 tumors demonstrated microsatellite stability. Of the 14 adenocarcinoma cases, three of which had both high-grade dysplasia and adenocarcinoma cells, and 11 of them contained only the adenocarcinoma component, with three of them having both high-grade dysplasia and adenocarcinoma tissue, and three of them contained both high-grade dysplasia and adenocarcinoma cells, and 11 of which only included the a and adenocarcinoma cases, 3 of a and a and a and a and a and a section a and a and a and a and a and a and a and a and a and a and a and a and a and a and a and a and a and a, and adenocarcinoma and a and a and a and adenoe and aden Interestingly, both three adenocarcinoma + high-grade dysplasia cases were marked by microsatellite instability, both the adenocarcinoma and high-grade dysplasia components. In three microsatellite instability-rich adenocarcinoma + high-grade dysplasia cases, mismatch repair proteins revealed mismatch repair deficiency. Conclusions Only adenocarcinoma cases with high-grade dysplasia components were linked to microsatellite instability, which was observed in high quantities.

Source link: https://doi.org/10.1007/s00595-022-02558-9


Genetic variability and population structure of the Japanese sea cucumber, Apostichopus japonicus Selenka, 1867 revealed by microsatellites in Peter the Great Gulf, Sea of Japan

Using ten microsatellite loci, genetic variation and population structure of the sea cucumber Apostichopus japonicus from four sampling locations in Peter, Sea of Japan, were determined. Among the 159 individuals of sea cucumber, 108 alleles were detected in total. The study of genetic variation among samples showed a high degree of heterogeneity among samples, which can be explained by a variety of variables: stochastic processes during larval settlement in a certain area; and variations in selection pressures on quantitative trait loci and related microsatellite loci.

Source link: https://doi.org/10.1007/s12526-022-01278-0

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions