🧬 biology

Post-defecation stability of fecal cortisol concentrations in Leopardus pardalis and L. wiedii under human care in the humid tropics of Mexico

This study demonstrates that fecal cortisol concentrations in captive ocelots and margays in the humid tropics of Mexico remain stable for up to 24 hours post-defecation, validating fecal cortisol as a reliable biomarker for assessing stress in these Neotropical felids under such environmental conditions.

Alejandra Riechers, Eduardo J. Naranjo, José Jorge Chanona-Pérez, Miguel Ángel Peralta-Meixueiro, Javier Gutiérrez-Jimén (…)2026-08-13
🧬 biology

Pregnancy induces transient brain and epigenetic aging followed by postpartum rejuvenation

This study utilizes two longitudinal brain imaging datasets to demonstrate that pregnancy induces a transient, multi-system aging process in the maternal brain, which is followed by a postpartum rejuvenation that results in a brain age younger than pre-conception levels by 16 months.

Susana Carmona, Magdalena Martínez-García, Daniel Martín de Blas, María Paternina-Die, Noelia García Acebes, Hannah Grot (…)2026-08-13
🧬 biology

Leakage-Free Evaluation of Machine-Learning Models for Alzheimer’s Disease Classification from Handwriting Dynamics

This study presents a rigorous, leakage-free machine-learning framework using the DARWIN handwriting dataset that demonstrates handwriting dynamics contain meaningful information for Alzheimer's disease classification, achieving high performance with Random Forest (88.11% accuracy) while addressing previous concerns regarding overfitting and validation design.

R. Samundi, Muthu Pandeeswari R, Kalpana D2026-08-13
🧬 biology

Single-cell and bulk transcriptomic analyses identify HSP90AA1- associated oxidative stress adaptation during impaired erythroid differentiation in β-thalassemia

This study integrates single-cell and bulk transcriptomic analyses to reveal that oxidative stress drives impaired erythroid differentiation and altered intercellular communication in β-thalassemia, identifying HSP90AA1 as a conserved, stress-responsive candidate gene linked to disrupted erythroid maturation.

Xunqi Ji, Jia Li, Xiaowei Feng, Yuwen Chen, Ning Zhang, Zefu Chen, Hong Liang, Yuehua Fu2026-08-13
🧬 biology

Seasonal hepatic plasticity follows a temporal response hierarchy in a Neotropical frog

This study on the Lesser Treefrog (*Dendropsophus minutus*) reveals that seasonal climate drives a temporal response hierarchy in hepatic plasticity, where whole-organism energy balance and tissue architecture respond immediately while intracellular processes lag by three months, demonstrating that the direction of biological cascades depends on the nature of the environmental driver.

Lilian Franco-Belussi, Luciana T. Moraes, Classius De Oliveira, Carlos E. Fernandes, Diogo B. Provete2026-08-13
🧬 biology

Integrative bulk transcriptomic analysis and experiment validation reveals the landscape of 13 RNA modifications-associated key genes in allergic rhinitis

This study integrates bulk transcriptomic analysis with experimental validation to identify CRNN, SMN1, and UPK1B as key RNA modification-associated genes that are significantly downregulated in allergic rhinitis, offering new insights into their roles in translation regulation and immune modulation for potential diagnostic and therapeutic applications.

Xufeng Pan, Xianghang Lin, Qingqing Xu, Zhu Mao, YunLiang Liu, Jinjin Lin, Yuting Huo2026-08-13
🧬 biology

Exploring the molecular regulatory network of non-pathological fetal overgrowth phenotype in Holstein cattle derived from in vitro embryo production

This study utilizes multi-omics integrative analysis to elucidate the molecular regulatory network underlying non-pathological fetal overgrowth in Holstein IVP calves, identifying two core ceRNA regulatory axes and arginine-proline metabolism as the central pathway driving systemic physiological and biochemical changes.

Leiyu Qu, Zhengyu Hang, Yao Chang, Lei Wang, Ruina Ma, Shanjiang Zhao, Qingshan Gao, Qing Xu, Yachun Wang2026-08-13