# Immature B cell homing shapes human lymphoid tissue structure and function

## TL;DR

This paper explores how immature B cells, after leaving the bone marrow, influence the structure and function of human lymphoid tissues through their migration patterns.

## Contribution

The paper introduces a novel perspective on how immature B cell subsets contribute to lymphoid tissue organization and function.

## Key findings

- Transitional B cells split into subsets with distinct homing receptor expression and IgM levels.
- Differential tissue homing of immature B cells shapes human lymphoid tissue structure and function.

## Abstract

After leaving the bone marrow, transitional B cells split into subsets with a biased expression of homing receptors accompanied by different levels of surface IgM. Here, Spencer and Dionisi discuss how this could contribute to human lymphoid tissue content and function.

Shortly after the emergence of newly formed human B cells from bone marrow as transitional cells, they diverge along two developmental pathways that can be distinguished by the level of IgM they express and migratory biases. Here, we propose that differential tissue homing of immature B cell subsets contributes to human lymphoid tissue structure and function.