Vascular Effects of Botulinum Toxin in Human Skin.

Botulinum toxin-A (BTX-A) is widely used for aesthetic purposes and is recognized for its vasomotor actions. However, new medical applications have emerged. This study aims to describe the effect of BTX-A on human skin perfusion, particularly vessel diameter, blood flow, and blood vessel density in regions with known low vessel density.

Trends in Prostate Cancer Incidence and Mortality Rates.

Importance: Incidence of distant stage prostate cancer is increasing in the United States. Research is needed to understand trends by social and geographic factors.

Objective: To examine trends in prostate cancer incidence and mortality rates in California by stage, age, race and ethnicity, and region.

Ambient Air Pollution and COPD: The Multiethnic Cohort Study.

Rationale: Globally, in 2019, chronic obstructive pulmonary disease (COPD) was the third leading cause of death. While tobacco smoking is the predominant risk factor, the role of long-term air pollution exposure in increasing risk of COPD remains unclear. Moreover, there are few studies that have been conducted in racial and ethnic minoritized and socioeconomically diverse populations, while accounting for smoking history and other known risk factors.

Secondary bile acid derivatives are contributors to the fecal bile acid pool and associated with bile acid modulating nutrients.

Objective: Accumulation of hydrophobic bile acids is linked with cancer development. However, derivatives of deoxycholic acid (DCA) and lithocholic acid (LCA) produced via bacterial metabolism may mitigate the proinflammatory and cytotoxic effects of hydrophobic bile acids. The impact of diet on secondary bile acid (BA) derivative production has not been determined.

More π, please: What drives the formation of unsaturated molecules in the interstellar medium?

We present a computational investigation into the fragmentation pathways of ethanolamine (CHNO, EtA), propanol (CHO, PrO), butanenitrile (CHN, BuN), and glycolamide (CHNO, GlA)-saturated organic molecules detected in the interstellar medium (ISM), particularly in the molecular cloud complex Sagittarius B2 (Sgr B2) and its molecular cloud G+0.693-0.027.