Sponge Morphology of Osteosarcoma Finds Origin in Synergy Between Bone Synthesis and Tumor Growth.

Osteosarcoma is medically defined as a bone-forming tumor with associated bone-degrading activity. There is a lack of knowledge about the network that generates the overproduction of bone. We studied the early stage of osteosarcoma development with mice enduring a periosteum injection of osteosarcoma cells at the proximal third of the tibia.

A cell-type specific surveillance complex represses cryptic promoters during differentiation in an adult stem cell lineage.

Regulators of chromatin accessibility play key roles in cell fate transitions, triggering onset of novel transcription programs as cells differentiate. In the male germ line stem cell lineage, tMAC, a master regulator of spermatocyte differentiation that binds thousands of loci, is required for local opening of chromatin, allowing activation of spermatocyte-specific promoters. Here we show that a cell-type specific surveillance system involving the multiple zinc finger protein Kmg and the pipsqueak domain protein Dany dampens transcriptional output from weak tMAC dependent promoters and blocks tMAC binding at thousands of additional cryptic promoters, thus preventing massive expression of aberrant protein-coding transcripts.

Evolving Guidelines for the Use of Touch During a Clinical Trial of Group Psilocybin-Assisted Therapy.

For a new clinical trial testing a group retreat-based format of psilocybin-assisted therapy, our research team created an initial set of practice guidelines that aimed to describe facilitator use of touch in a way that is ethical, supportive, and minimizes harm. In our first three retreats, however, we had two unexpected experiences with touch that led us to iterate our initial guidelines into a new version of guidelines. In this Technical Report, we describe our evolving guidelines specifying acceptable practices for facilitator use of touch to ensure a safe, supportive, and therapeutic participant experience.

Peripheral and Central Hemodynamic Responses to Rhythmic Handgrip Exercise in Young, Healthy Black Women.

Purpose: Non-Hispanic Black (NHB) women in the United States exhibit higher prevalence and mortality rates from cardiovascular diseases compared to non-Hispanic White (NHW) women. Previous studies in NHB men have demonstrated impaired vascular function at rest and during exercise; however, to date, no studies have investigated the hyperemic responses during exercise in NHB women. Therefore, we tested the hypothesis that, compared with NHW women, NHB women would present an attenuated increase in forearm blood flow (FBF) and forearm vascular conductance (FVC) during steady-state rhythmic handgrip exercise.

Cell signaling facilitates apical constriction by basolaterally recruiting Arp2/3 via Rac and WAVE.

Apical constriction is a critical cell shape change that drives cell internalization and tissue bending. How precisely localized actomyosin regulators drive apical constriction remains poorly understood. Caenorhabditis elegans gastrulation provides a valuable model to address this question.