Adaptive and Maladaptive Myeloid Cell Production

Adaptive and Maladaptive Myeloid Cell Production

by Emmanuelle Passegué

Life & Natural Systems Medicine & Health MMedicine and NursingMJFHaematology
🎙 Emmanuelle Passegué 👥 29K 📅 November 20, 2025 ⏱ 29 min 👁 199 📄 expert opinion 🧭 2026-08-06
Available in: English (current) Français

Keywords

emergency myelopoiesishematopoietic stem cellsmyeloid progenitorsGMP clustersinflammation

Summary

In this lecture, Emmanuelle Passegué discusses the mechanisms of emergency myelopoiesis, the process by which the hematopoietic system rapidly produces myeloid cells in response to stress such as infection or tissue damage. She explains the hierarchical remodeling that occurs, from quiescent hematopoietic stem cells (HSCs) to multipotent progenitors, with a focus on the emergence of a myeloid-biased MPP3 subset and the formation of granulocyte-macrophage progenitor (GMP) clusters in the bone marrow niche. These clusters are transient structures that amplify myeloid production and are regulated by cytokines like IL-6, IL-1, TNF-alpha, and interferons. Passegué highlights the role of metabolic changes, such as a switch from glycolysis to oxidative phosphorylation, and epigenetic reprogramming. She also discusses maladaptive activation of these pathways in chronic inflammatory diseases and myeloid malignancies, where GMP clusters persist and contribute to disease progression. The talk includes imaging and spatial transcriptomics data, and concludes with ongoing research on the signals that terminate the emergency response.

156 words

Critical Evaluation

The lecture provides a comprehensive overview of emergency myelopoiesis, drawing on extensive experimental evidence from the speaker’s laboratory. Passegué’s expertise is evident in her detailed descriptions of cellular mechanisms, including the identification of a novel MPP3 subset with rough endoplasmic reticulum that secretes inflammatory cytokines. The use of imaging and spatial transcriptomics adds depth to the understanding of GMP cluster formation. The argumentation is logically structured, moving from steady-state hematopoiesis to emergency responses and then to maladaptive states in disease. The scientific rigor is high, with references to specific experimental models (e.g., BCR-ABL-induced CML, MLL-AF9 AML) and published studies. However, as a conference talk, it lacks detailed methodological descriptions and statistical analyses, which limits its utility for replication. The sources cited are primarily the speaker’s own work and institutional links, which are appropriate but not exhaustive. The title accurately reflects the content. Overall, the lecture is valuable for researchers in hematology and immunology, providing insights into the dynamic regulation of myeloid cell production and its implications for disease.

168 words

Title / Content Match

The title accurately reflects the content, focusing on adaptive and maladaptive myeloid cell production in the context of emergency myelopoiesis.

Quality & Reliability

8/10

Lecture by a leading expert (Emmanuelle Passegué, Columbia University) presenting original research findings, with references to published work and institutional context (Collège de France). The content is specialized and based on experimental evidence, though presented as a conference talk without full methodological details.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

External References

Contribution & Novelties

The lecture presents original findings on the cellular and molecular mechanisms of emergency myelopoiesis, particularly the discovery of a novel MPP3 subset with rough endoplasmic reticulum that secretes inflammatory cytokines, and the formation of GMP clusters in the bone marrow niche. It also highlights the maladaptive consequences of these processes in chronic inflammation and leukemia.

Pour aller plus loin :

87 words

Radar Profile

The radar profile shows high scores in information quantity, quality, technical level, and reliability, indicating a dense, expert-level presentation with strong scientific backing. The lower score in adequacy of title (not shown in radar) is minor and does not detract from the overall high quality.

Reliability 8/10