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Новости за 10.07.2023

Absolute quantification of neuromelanin in formalin-fixed human brains using absorbance spectrophotometry

Plos.org 

by Dipshay Avi Chand, Miriam Scadeng, Birger Victor Dieriks

Parkinson’s disease is characterised by a visual, preferential degeneration of the pigmented neurons in the substantia nigra. These neurons are pigmented by neuromelanin which decreases in Parkinson’s disease. Not much is known about NM as it is difficult to study and quantify, primarily due to its insolubility in most solvents except alkali. Neuromelanin quantification could progress the development of biomarkers for prodromal Parkinson’s... Читать дальше...

Association of plasma miRNAs with early life performance and aging in dairy cattle

Plos.org 

by Madison MacLeay, Georgios Banos, Francesc Xavier Donadeu

Early life performance traits in dairy cattle can have important influences on lifetime productivity. Poor health and fertility are of great economical and animal welfare concern. Circulating miRNAs have been linked to several livestock traits, including resistance to infection, fertility, and muscle development. This study aimed to identify circulating miRNAs associated with early life performance traits and aging in dairy cattle. Читать дальше...

Expression analysis of box C/D snoRNAs with SNPs between C57BL/6 and MSM/Ms strains in male mouse

Plos.org 

by Rumiko Saito, Maina Otsu, Hidenori Kiyosawa, Gota Kawai

MSM/Ms mouse derived from the Japanese wild mouse has unique characteristics compared to the widely used C57BL/6 mouse. To examine the usefulness of the MSM/Ms mouse for the comparative genomic analysis, expression of small RNAs were analyzed by the large-scale sequence analysis for two strains of mouse, C57BL/6 and MSM/Ms. As a trial, expression of box C/D snoRNAs, which are the most abundant small RNAs in the cell, were analyzed. Читать дальше...



Identification of a partnership model between a university, for-profit, and not-for-profit organization to address health professions education and health inequality gaps through simulation-based education: A scoping review protocol

Plos.org 

by Samyah Siraj, Beheshta Momand, Ginny Brunton, Adam Dubrowski

Introduction

Healthcare providers in rural and remote (R&R) areas of Canada do not have the same access to skills development and maintenance opportunities as those in urban areas. Simulation-based education (SBE) is an optimal technique to allow healthcare providers to develop and maintain skills. However, SBE is currently limited mainly to universities or hospital-based research laboratories in urban areas. The purpose of this scoping review is to identify a model... Читать дальше...

Prevalence of cardiovascular risk factors among Asian migrant workers in South Korea

Plos.org 

by Pratibha Bhandari

Background

The burden of non-communicable diseases is rapidly increasing among young adults in middle- and low-income countries. Asian migrant workers continue to be a significant contributor to South Korea’s economy; however, their cardiovascular health is neglected. We explored the prevalence of cardiovascular risk factors among Asian migrant workers in South Korea.

Methods

Cross-sectional survey, anthropometric measurements, blood pressure measurements, and biochemical tests including triglyceride... Читать дальше...

A physics-based model of swarming jellyfish

Plos.org 

by Erik Gengel, Zafrir Kuplik, Dror Angel, Eyal Heifetz

We propose a model for the structure formation of jellyfish swimming based on active Brownian particles. We address the phenomena of counter-current swimming, avoidance of turbulent flow regions and foraging. We motivate corresponding mechanisms from observations of jellyfish swarming reported in the literature and incorporate them into the generic modelling framework. The model characteristics is tested in three paradigmatic flow environments.

Nuclear elongation during spermiogenesis depends on physical linkage of nuclear pore complexes to bundled microtubules by Drosophila Mst27D

Plos.org 

by Pengfei Li, Giovanni Messina, Christian F. Lehner

Spermatozoa in animal species are usually highly elongated cells with a long motile tail attached to a head that contains the haploid genome in a compact and often elongated nucleus. In Drosophila melanogaster, the nucleus is compacted two hundred-fold in volume during spermiogenesis and re-modeled into a needle that is thirty-fold longer than its diameter. Nuclear elongation is preceded by a striking relocalization of nuclear pore complexes (NPCs). Читать дальше...

Sequential mutations in exponentially growing populations

Plos.org 

by Michael D. Nicholson, David Cheek, Tibor Antal

Stochastic models of sequential mutation acquisition are widely used to quantify cancer and bacterial evolution. Across manifold scenarios, recurrent research questions are: how many cells are there with n alterations, and how long will it take for these cells to appear. For exponentially growing populations, these questions have been tackled only in special cases so far. Here, within a multitype branching process framework, we consider a... Читать дальше...

LRT: Integrative analysis of scRNA-seq and scTCR-seq data to investigate clonal differentiation heterogeneity

Plos.org 

by Juan Xie, Hyeongseon Jeon, Gang Xin, Qin Ma, Dongjun Chung

Single-cell RNA sequencing (scRNA-seq) data has been widely used for cell trajectory inference, with the assumption that cells with similar expression profiles share the same differentiation state. However, the inferred trajectory may not reveal clonal differentiation heterogeneity among T cell clones. Single-cell T cell receptor sequencing (scTCR-seq) data provides invaluable insights into the clonal relationship among cells, yet it lacks functional characteristics. Читать дальше...





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