Rock Lab

@rocklabtb.bsky.social

Rock Lab @ Rockefeller University. Tuberculosis functional genomics.

Rockefeller's Winrich Freiwald is a 2026 winner of the Gertrud Reemtsma Foundation’s Prize for Translational Neuroscience! He is honored for his work deciphering complex neural processes in visual perception and social cognition. Congratulations!

Doris Tsao and Winrich Freiwald Receive the International Prize for Translational Neuroscience

Researchers are honored for their groundbreaking insights into the neural basis of face and object recognition

mpg.de

Very excited this work by Victor and Jakson @crick.ac.uk is out!! started many years ago with @jvaubourgeix.bsky.social They generated Mtb-Timer, a fluorescent reporter in Mtb as a proxy for Mtb replication and measure antibiotic responses Mtbhttps://journals.asm.org/doi/10.1128/msystems.01796-25

Mtb-Timer: a fluorescent reporter to visualize Mycobacterium tuberculosis replication and antibiotic responses | mSystems

Tuberculosis treatment is challenging in part because Mycobacterium tuberculosis (Mtb) populations are phenotypically heterogeneous. Within the same infection, bacterial cells can exist in different physiological states, from actively replicating to slow-growing or non-replicating forms. To better study these processes, we developed and validated Mtb-Timer, a fluorescent reporter that enables visualization of bacterial growth dynamics. The system is based on a fluorescent protein that changes color over time: newly synthesized protein emits green fluorescence (GFP) and gradually shifts to red (DsRed) as it matures. The green-to-red fluorescence ratio, therefore, reflects bacterial replication activity. Using microscopy and flow cytometry in both in vitro cultures and infected macrophages (in cellulo), Mtb-Timer enables the quantification of distinct bacterial subpopulations and the real-time monitoring of the green-to-red fluorescence ratio and bacterial burden during treatment with first-line antibiotics.

journals.asm.org