Cofactors facilitate bona fide prion misfolding in vitro but are not necessary for the infectivity of recombinant murine prions.

Prion diseases, particularly sporadic cases, pose a challenge due to their complex nature and heterogeneity. The underlying mechanism of the spontaneous conversion from PrPC to PrPSc, the hallmark of prion diseases, remains elusive. To shed light on this process and the involvement of cofactors, we have developed an in vitro system that faithfully mimics spontaneous prion misfolding using minimal components.

EULAR standardised training model for ultrasound-guided, minimally invasive synovial tissue biopsy procedures in large and small joints.

Objectives: To develop an EULAR training model for education in synovial tissue biopsy (STB) under ultrasound guidance (UG) following a stepwise approach: (1) development of educational material on UGSTB in large and small joints; (2) assessment of the validity, reliability and feasibility of the UGSTB educational procedure on cadaveric specimens; (3) validation of this procedure in live patients.

Methods: Using a nominal group (NG) and a DELPHI consensus methodology, educational audio-visual (AV) material and minimal requirements for education in UGSTB were developed by an expert panel. Then the experts performed an UGSTB on cadaveric joints using the developed approach.

Breaking down global barriers: A multinational and multi-community approach to combat stigma and enhance mental wellbeing in people with HIV.

Introduction: The Joint United Nations Programme on HIV/AIDS (UNAIDS) Global 2025 targets prioritize action to overcome the collective barriers affecting the people and communities sitting on the outer margins of HIV care. Addressing the social and structural disparities that drive greater HIV prevalence and burden requires well-resourced, community-led responses that are fully integrated into national and global HIV initiatives.

Methods: The HIV Community Council (HCC), composed of 10 leaders from diverse global communities, convened to share their insights, amplify the community's voice, and identify barriers and solutions to empower all to live well with HIV through a dynamic, stepwise process of preparative work, deep discussion, prioritization, and consensus.

Ancient DNA Reveals the Earliest Evidence of Sheep Flocks During the Late Fourth and Third Millennia BC in Southern Iberia.

The Spanish Merino is the most significant sheep breed globally due to its economic and cultural importance in human history. It has also had a substantial influence on the development of other Merino and Merino-derived breeds. Historical sources indicate that crossbreeding to produce finer, higher-quality wool was already taking place in the south of the Iberian Peninsula during the Roman era.

Key concepts and a world-wide look at plant recruitment networks.

Plant-plant interactions are major determinants of the dynamics of terrestrial ecosystems. There is a long tradition in the study of these interactions, their mechanisms and their consequences using experimental, observational and theoretical approaches. Empirical studies overwhelmingly focus at the level of species pairs or small sets of species.