Sorbonne Université

Vulnerable microbial communities in Atacama-Altiplano wetlands: modern analogs of ancient ecosystems with implications for sustainability and conservation

Abstract The Altiplano-Puna plateau lies at ∼4,000 m above sea level in the volcanic Andes cordillera. Together with the adjacent Atacama Desert, it forms one of the most hyperarid regions on the planet. Wetlands are rare, influenced by hydrothermalism and, due to high evaporatio...

Cuproptosis: an emerging member of the immunogenic cell death family

Cell death was long considered the terminal consequence of cellular stress or damage, and distinct cell death modalities were classified according to their molecular execution mechanisms rather than their immunological impact [ 1 , 2 ]. This reductionist view has progressively be...

Numerical proof-of-concept of nanofoam-based targets for proton acceleration and high-energy photon and positron generation in strong fields

A source of high-energy photons, ions, and positrons can be attained with the interaction of ultra-intense femtosecond laser pulses with advanced nanostructured targets. We present and characterise a numerical model that mimics the foam deposition process on solid substrates, as...

Covalently Linked Peptides and Membrane Potential Enable CyaA Segment Translocation

The adenylate cyclase toxin (CyaA) from Bordetella pertussis intoxicates host cells by directly translocating its N-terminal catalytic domain across the plasma membrane; however, the forces driving this unique process remain poorly defined. Here, we dissect the membrane transloca...

Neurobiological correlates of longitudinal grey matter volume changes in preclinical Alzheimer’s disease

Background: Structural brain changes during the earliest asymptomatic stages of Alzheimer's disease (AD) remain poorly understood. Previous research in preclinical AD shows heterogeneous findings, reporting both subtle neuronal loss and paradoxical increases in grey matter (GM) v...

A compilation of global bio-optical in situ data for ocean-colour satellite applications – version four

Abstract. A global in situ dataset for validation of satellite products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, with data starting in 1996, extends to 2025, which is important for the validation of recent algorit...

The Association of Umbilical Cord Blood Neurofilament Light With Nonreassuring Fetal Status: A Prospective Observational Study

( Int J Gynaecol Obstet . 2026 Mar;172(3):1491–1500. doi:10.1002/ijgo.70421) A prospective observational study explored whether neurofilament light (NfL), a marker of neuronal injury, can be reliably measured in umbilical cord blood and whether it is associated with nonreassuring...

On the Zitterbewegung and light-like internal dynamics of the electron

This paper focuses on the understanding of the electron and its intrinsic properties. We analyze the Zitterbewegung motion, that gives information about the internal dynamics of the electron (with internal motion at the speed of light with an amplitude at Compton scale). This app...

Identification of living (Rose Bengal)-stained benthic foraminifera using automated image recognition

Abstract. Living and fossil benthic foraminifera are widely used as bioindicators of ecosystem quality, but their analysis is time-consuming. With the help of artificial intelligence, models for the automatic identification of fossil planktonic foraminifera and, more recently, be...

Impact of chronic doxycycline treatment in a mouse model of tauopathy

Tauopathies are neurodegenerative disorders characterized by the accumulation of hyperphosphorylated tau, leading to synaptic dysfunction, neuroinflammation, and both cognitive and motor impairments. Doxycycline (Doxy), a tetracycline antibiotic commonly used to treat bacterial i...

Sensitivity of the Bootstrap sea ice concentration algorithm to surface parameters in the Antarctic marginal ice zone using passive microwave retrievals

Abstract. Changes in sea ice concentration (SIC) and derived sea ice extent have been monitored using microwave radiometers since the late 1970s, providing information about the polar response to climate change, making SIC an invaluable variable for numerical models. Antarctic se...

Evidence of a massive accretion event 1.8 billion years before the Gaia-Sausage-Enceladus merger

Abstract The merger history of the Galaxy has been traced back firmly to a redshift of 2 (10 billion years ago). While evidence for the existence of at least one more substantial merger before this time has been presented, its interpretation is yet to be fully established. Here w...

An Investigation Into the Seasonality and Quality of Food on Marina Pontoon Structures for the Candidate Marine Biological Control Agent, Lunella smaragda (Gastropoda)

This study investigates how food availability aligns with nutritional requirements of the snail Lunella smaragda , a potential biological control agent for managing biofouling in recreational vessel hubs. Biofouling communities were assessed during two contrasting seasons to gain...

Iron Isotopes Reveal Fe Export Driven by Change of Tropical Weathering Regime

Abstract Unraveling paleoenvironmental signals recorded in laterites is crucial for quantifying weathering‐driven elemental fluxes at the Earth's surface. New stable iron isotope data (δ 56 Fe), combined with (U‐Th)/He ages in Fe‐oxides from a ferruginous duricrust from French Gu...

Contrasting seasonal roles of external forcing and internal variability in East Asian temperature

How to reliably separate external forcing (EXF) and internal variability (IV) components of regional temperature variation is of critical importance in East Asia. We implement here an EOF-based semi-empirical framework to avoid spurious teleconnections often present with conventi...

The extreme diversity of retinal amacrine cells has deep evolutionary roots

Amacrine cells (ACs) comprise a heterogeneous class of inhibitory neurons in the vertebrate retina, exhibiting morphological and functional complexity rivaling that of cortical interneurons. Here, we integrate single-cell and single-nucleus transcriptomic atlases from 24 vertebra...

Occurrence and controls of ~ 1 Hz waves in Mercury’s magnetosphere: insights from MESSENGER observations

<title>Abstract</title> Mercury’s magnetosphere is highly dynamic, with processes occurring on much shorter spatial and temporal scales than at Earth due to its weak magnetic field and proximity to the Sun. Wave-driven transport of energy and momentum is a key manifestation of th...

Will work for sardines: 20 years of animal-borne ocean observing by Australia’s Integrated Marine Observing System (IMOS) Animal Tagging Facility

The world’s ocean stores ~90% of the excess heat generated by anthropogenic global warming, making sustained ocean observations essential for understanding physical, biological and climate processes. Here, we describe how the Integrated Marine Observing System (IMOS) Animal Taggi...

Impedance pneumography to explore bronchial obstruction in young infants born moderate-late preterm: a cohort study

Background Wheezing, a symptom reflecting bronchial obstruction, is frequently reported in preterm-born infants. No objective and reliable tool is available to assert this diagnosis with minimal patient cooperation. Nocturnal tidal breathing measurements by impedance pneumography...

An Alternative Approach to Compute the Likelihood for the DAISIE (Dynamic Assembly of Island Biota Through Speciation, Immigration, and Extinction) Model

Abstract Understanding island biodiversity requires studying the processes driving its assembly and examining how these processes vary over time, across lineages, and across different islands. The DAISIE (Dynamic Assembly of Island biota through Speciation, Immigration, and Extin...