Ancient rocks reveal that Earth’s magnetic field during the Ediacaran may not have been chaotic after all.
Category: futurism
RCC1 depletion drives protein transport defects and rupture in micronuclei
Spotlight: Hiba Baaziz and Daniela Cimini (Virginia Tech) discuss recent work from Zych et al. (https://hubs.la/Q0485YJy0), showing that low RCC1 levels impair protein export in micronuclei, causing overgrowth and rupture. https://hubs.la/Q0485R1g0
Micronuclei (MN), a hallmark of chromosome instability, frequently rupture, leading to protumorigenic consequences. MN rupture requires nuclear lamina defects, yet their underlying causes remain unclear. Here, we demonstrate that MN lamina gaps are linked to excessive MN growth resulting from impaired protein export. This export defect arises from reduced levels of the transport protein RCC1 in MN. Overexpressing RCC1 increases protein export and protects MN from rupture. Differences in RCC1 levels linked to chromatin state also explain why high euchromatin content increases the stability of small MN. Additional RCC1 loss in euchromatic MN results in impaired protein import. For these MN, increasing RCC1, directly or through increasing histone methylation, accelerates rupture. Our findings define a new model of MN rupture, where defects in protein export drives continuous MN growth causing nuclear lamina gaps that predispose MN to membrane rupture and where chromatin-specific features can alter rupture of small MN by further impairing nuclear transport.
The many pathways driving liver inflammation in MASH
Online now: Intra-and extrahepatic inflammation in MASH is driven by various hits such as lipotoxicity, the gut microbiome, and proinflammatory diets. Inflammation contributes to hepatic and systemic complications, including cardiovascular diseases. Beneficial drugs in MASH might target metabolic and inflammatory pathways.
Inflammation is a key driver of this disease, and effective future therapies might have to target metabolic and inflammatory pathways.
Assessment of inflammation, i.e., MASH in humans, is still challenging as it might appear intermittently during the clinical course and could be missed by liver biopsy. Future non-invasive strategies assessing the liver’s inflammatory burden are eagerly awaited.
Chinese Bosses in Iran War: We Fear Poverty, Not Death—Refusing to Return Home!
A Chinese worker in Israel posted this video on Douyin. In the comment section, people were shocked: \.
