Spontaneous base flipping helps drive Nsp15's preferences in double stranded RNA substrates.

Coronaviruses evade detection by the host immune system with the help of the endoribonuclease Nsp15, which regulates levels of viral double stranded RNA by cleaving 3' of uridine (U). While prior structural data shows that to cleave double stranded RNA, Nsp15's target U must be flipped out of the helix, it is not yet understood whether Nsp15 initiates flipping or captures spontaneously flipped bases. We address this gap by designing fluorinated double stranded RNA substrates that allow us to directly relate a U's sequence context to both its tendency to spontaneously flip and its susceptibility to cleavage by Nsp15.

Racial differences in clinical trial perceptions among a large, predominantly Black cohort of people with systemic lupus erythematosus in the Southeastern USA.

Objective: Black people in the USA have a higher incidence and severity of SLE and worse outcomes, yet they are significantly under-represented in SLE clinical trials. We assessed racial differences in clinical trial perceptions among a large cohort of predominantly Black people with SLE.

Methods: Georgians Organised Against Lupus (GOAL) is a population-based, prospective cohort of people with a validated diagnosis of SLE living in Atlanta.

Multi-institutional development and testing of attention-enhanced deep learning segmentation of thyroid nodules on ultrasound.

Purpose: Thyroid nodules are common, and ultrasound-based risk stratification using ACR's TIRADS classification is a key step in predicting nodule pathology. Determining thyroid nodule contours is necessary for the calculation of TIRADS scores and can also be used in the development of machine learning nodule diagnosis systems. This paper presents the development, validation, and multi-institutional independent testing of a machine learning system for the automatic segmentation of thyroid nodules on ultrasound.

The relationship between life regrets and well-being: a systematic review.

Introduction: The aim of the current study is to examine the association between life regret and well-being, through a systematic review.

Methods: Four different databases (PsycINFO, Web of Science, ProQuest, Dissertations & Theses Global, and ERIC) were used to source 31 relevant articles, published between 1989 and 2018.

Results: We conclude that experiencing greater life regret is associated with negative effects on various aspects of well-being, such as life satisfaction and depressive symptoms.

Risk of adverse birth outcomes and birth defects among women living with HIV on antiretroviral therapy and HIV-negative women in Uganda, 2015-2021.

Introduction: We assessed the risk of adverse pregnancy and birth outcomes and birth defects among women living with HIV (WLHIV) on antiretroviral therapy (ART) and HIV-negative women.

Methods: We analyzed data on live births, stillbirths, and spontaneous abortions during 2015-2021 from a hospital-based birth defects surveillance system in Kampala, Uganda. ART regimens were recorded from hospital records and maternal self-reports.