Experimental organisms articles from across Nature Portfolio

In this study, the authors show that a single dose of a combination of two human-like monoclonal antibodies protect mice in therapeutic treatment against challenges with ectromelia virus and monkeypox virus. Combination treatment provided more effective viral clearance than single antibody treatment.

Generation of an endogenous Cyp1a1 luciferase reporter mouse model to dynamically and longitudinally visualize AHR activity throughout lifespan and in response to ligand exposure, reveals prolonged AHR activation in the lung.

Kim et al. discover a subset of neurons that innervate the Drosophila intestine and act as postprandial taste-independent sensors for sodium, directing a behavioural preference for sodium following salt deprivation.

Brown seaweeds are multicellular eukaryotes that have been evolving independently of animals and plants for more than a billion years. The filamentous brown alga Ectocarpus has been used as a model to understand the biology of these enigmatic organisms and to shed light on a range of major questions, from the molecular basis of complex developmental patterns to the evolution of sex.

Sirtuins remove post-translationally added acyl groups from protein lysines. New work shows the surprising metabolic fate of acyl groups removed from mitochondrial proteins—they react nonenzymatically with essential polyamine spermidine, forming previously unknown monoacylated N-glutarylspermidines and diacylated N-glutaryl,N-acetylspermidines.

Facemap tracks keypoints on the mouse face and feeds the information into a deep neural network to predict neural activity.

The requirement for a protospacer adjacent motif (PAM) is a well-known limitation of the CRISPR–Cas9 system, as it restricts the range of sequences that can be targeted. To address this limitation, we demonstrate a phage-assisted evolution approach for engineering a compact SlugCas9, simplifying its PAM requirement and broadening its DNA targeting scope.

The demand for kidney transplants is far from met by human donors — a problem that may be solved by the clinical translation of porcine kidney xenotransplantation. A new paper describes the development of genetically ‘humanized’ pigs, the kidneys of which kept nephrectomized cynomolgus macaques alive for up to 2 years.