Return to Sports After Surgical Treatment of Rotator Cuff Tear in Young Athletes: A Systematic Review and Meta-analysis.

Background: Young athletes who undergo surgery for a rotator cuff tear (RCT) are expected to return to sports (RTS) at the preinjury level.

Purpose: To determine the rate and level of RTS and associated factors after RCT surgery in young athletes.

Study Design: Systematic review; Level of evidence, 4.

PARP1- and CTCF-Mediated Interactions between Active and Repressed Chromatin at the Lamina Promote Oscillating Transcription.

Transcriptionally active and inactive chromatin domains tend to segregate into separate sub-nuclear compartments to maintain stable expression patterns. However, here we uncovered an inter-chromosomal network connecting active loci enriched in circadian genes to repressed lamina-associated domains (LADs). The interactome is regulated by PARP1 and its co-factor CTCF.

The visualization of large organized chromatin domains enriched in the H3K9me2 mark within a single chromosome in a single cell.

Despite considerable efforts, our understanding of the organization of higher order chromatin conformations in single cells and how these relate to chromatin marks remains poor. We have earlier invented the Chromatin In Situ Proximity (ChrISP) technique to determine proximities between chromatin fibers within a single chromosome. Here we used ChrISP to identify chromosome 11-specific hubs that are enriched in the H3K9me2 mark and that project toward the nuclear membrane in finger-like structures.

Chromatin in situ proximity (ChrISP): single-cell analysis of chromatin proximities at a high resolution.

Current techniques for analyzing chromatin structures are hampered by either poor resolution at the individual cell level or the need for a large number of cells to obtain higher resolution. This is a major problem as it hampers our understanding of chromatin conformation in single cells and how these respond to environmental cues. Here we describe a new method, chromatin in situ proximity (ChrISP), which reproducibly scores for proximities between two different chromatin fibers in 3-D with a resolution of ~170Å in single cells.

Female-biased expression of long non-coding RNAs in domains that escape X-inactivation in mouse.

Background: Sexual dimorphism in brain gene expression has been recognized in several animal species. However, the relevant regulatory mechanisms remain poorly understood. To investigate whether sex-biased gene expression in mammalian brain is globally regulated or locally regulated in diverse brain structures, and to study the genomic organisation of brain-expressed sex-biased genes, we performed a large scale gene expression analysis of distinct brain regions in adult male and female mice.

Nonallelic transvection of multiple imprinted loci is organized by the H19 imprinting control region during germline development.

Recent observations highlight that the mammalian genome extensively communicates with itself via long-range chromatin interactions. The causal link between such chromatin cross-talk and epigenetic states is, however, poorly understood. We identify here a network of physically juxtaposed regions from the entire genome with the common denominator of being genomically imprinted.