RANKL Induces Organized Lymph Node Growth by Stromal Cell Proliferation

December 2011 in “ The journal of immunology/The Journal of immunology ”

Estelle Hess, Vincent Duhéron, Marion Décossas, Frédéric Lézot, Ariane Berdal, Sylvestre Chea, Rachel Golub, Mattéo R. Bosisio, S. Lori Bridal, Yongwon Choi, Hideo Yagita, Christopher G. Mueller

RANKL Rank hair follicles B cell follicles stromal cells soluble RANKL reticular fibroblastic cells vascular stromal cells CXCL13 CCL19 MAdCAM-1 VCAM-1

Studysummary In this study, transgenic mice with Rank expression in hair follicles showed excessive lymph node growth, which could be normalized by neutralizing the overproduced RANKL, underscoring its role in immune system regulation.

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The study concluded that RANKL (Receptor Activator of Nuclear Factor Kappa-Β Ligand) was essential for the organized growth of lymph nodes by promoting the proliferation of stromal cells. This process was crucial for the development and maintenance of lymphoid tissue microarchitecture, which is vital for immune defense. The research, involving 11 Rank-Tg and 8 wild-type mice, demonstrated that RANKL from hair follicles induced lymph node hyperplasia, which could be normalized by blocking RANKL. The findings suggested potential therapeutic targets for diseases involving lymph node dysfunction and provided insights into immune system development and homeostasis.

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