Lingjun Li

1 month ago | nature.com | Hua Zhang |Lang Ding |Amy Hu |Xudong Shi |Penghsuan Huang |Haiyan Lu | +3 more

The spatial distribution of diverse biomolecules in multicellular organisms is essential for their physiological functions. High-throughput in situ mapping of biomolecules is crucial for both basic and medical research, and requires high scanning speed, spatial resolution, and chemical sensitivity. Here we developed a tissue-expansion method compatible with matrix-assisted laser desorption/ionization mass-spectrometry imaging (TEMI). TEMI reaches single-cell spatial resolution without sacrificing voxel throughput and enables the profiling of hundreds of biomolecules, including lipids, metabolites, peptides (proteins), and N-glycans. Using TEMI, we mapped the spatial distribution of biomolecules across various mammalian tissues and uncovered metabolic heterogeneity in tumors. TEMI can be easily adapted and broadly applied in biological and medical research, to advance spatial multi-omics profiling. Tissue-expansion method compatible with mass-spectrometry imaging (TEMI) enables the profiling of lipids, metabolites, peptides, proteins, and N-glycans in complex tissues with high spatial resolution, advancing spatially resolved multi-omics mapping.

Jul 18, 2024 | nature.com | Di Zhang |Jinjun Gao |Zhijun Zhu |Pankaj K. Singh |Cornelius Rimayi |Carlos Moreno-Yruela | +7 more

AbstractLysine l-lactylation (Kl-la) is a novel protein posttranslational modification (PTM) driven by l-lactate. This PTM has three isomers: Kl-la, N-ε-(carboxyethyl)-lysine (Kce) and d-lactyl-lysine (Kd-la), which are often confused in the context of the Warburg effect and nuclear presence.

May 13, 2024 | nature.com | Fengfei Ma |Chao Xing |Lingjun Li |Wenzhi Sun

AbstractThe subcommissural organ (SCO) is a gland located at the entrance of the aqueduct of Sylvius in the brain. It exists in species as distantly related as amphioxus and humans, but its function is largely unknown. Here, to explore its function, we compared transcriptomes of SCO and non-SCO brain regions and found three genes, Sspo, Car3 and Spdef, that are highly expressed in the SCO.