# Time – The fourth dimension of immune cells

## TL;DR

Zman-seq is a new single-cell technology that tracks immune cell changes over time, helping to understand immune responses in diseases like cancer.

## Contribution

Zman-seq introduces a novel method to capture and track immune cell transcriptomic dynamics in vivo over extended periods.

## Key findings

- Zman-seq successfully unraveled cell state and molecular trajectories in the dysfunctional immune microenvironment of glioblastoma.
- The technology enables tracking of immune cells in tissues for extended periods by incorporating time stamps into transcriptomic data.
- Zman-seq has potential to improve immunotherapy, including CAR T-cell therapy and drug development for cancer and non-cancer diseases.

## Abstract

Deciphering the intricate cell‐state transitions orchestrating immune adaptation over time stands as a cornerstone for advancing biological understanding. However, the lack of empirical in vivo genomic technologies capable of capturing cellular dynamics has posed a significant challenge. In response to this gap, a groundbreaking study introduces Zman‐seq, a single‐cell technology that records transcriptomic dynamics across time by incorporating time stamps into circulating immune cells, enabling their tracking in tissues for extended periods. The application of Zman‐seq in glioblastoma research has successfully unraveled the cell state and molecular trajectories underlying the dysfunctional immune microenvironment. Understanding the temporal aspects of cell‐state transitions during immune responses is pivotal for advancing our knowledge in biology. The emergence of Zman‐seq addresses the current limitations in empirical in vivo genomic technologies, offering a revolutionary approach to studying the dynamics of immune cells over time. This highlight comprehensively explores the implications of Zman‐seq in resolving cell‐state transitions and molecular trajectories within the dysfunctional immune microenvironment in different types of immunotherapy. This technique has particular potential for chimeric antigen receptor T‐cell therapy, overriding drug resistance, clinical medication optimization, and facilitating drug development. In particular, this article discusses potential strategies for improving the efficacy of clinical treatments.

Potential implications of Zman‐seq in different types of clinical‐related therapies. Zman‐seq offers a more nuanced approach to modulating immune responses, especially in empowering chimeric antigen receptor T‐cell therapy, overriding drug resistance, optimizing clinical medication, and facilitating drug development, in either cancer or non‐cancer diseases.