Unknown

Dataset Information

0

A role for leptin in sustaining lymphopoiesis and myelopoiesis.


ABSTRACT: Although leptin is known for its regulation of food intake, it has many emerging roles in immune function. To better define the role of leptin in hematopoietic processes, a leptin-deficient obese mouse (ob/ob) and C57BL/6 lean wild-type controls were compared. Despite their large size and consumption of substantial amounts of nutrients, the ob/ob mice had only 60% as many nucleated cells in their marrow as controls. The greatest impact of leptin deficiency was on the B cell compartment that had 70% fewer cells, reducing the absolute number of pre-B and immature B cells to 21% and 12% of normal, respectively, and indicating a significant reduction in lymphopoiesis in ob/ob mice. Whereas the proportion of myeloids remained nearly normal in the obese mice, they also exhibited a reduction of 40% and 25%, respectively, in absolute numbers of granulocytes and monocytes. Seven days of provision of recombinant leptin promoted substantial lymphopoiesis, increasing the numbers of B cells in the marrow of the obese mice twofold, while doubling and tripling, respectively, the numbers of pre-B and immature B cells. Twelve days of supplementation brought these subpopulations to near-normal proportions. Leptin treatment also facilitated myelopoiesis such that the marrow of the obese mice contained normal numbers of monocytes and granulocytes after 7 days. Taken together, the data support an important role for leptin in sustaining lymphopoiesis and myelopoiesis.

SUBMITTER: Claycombe K 

PROVIDER: S-EPMC2538874 | biostudies-other | 2008 Feb

REPOSITORIES: biostudies-other

altmetric image

Publications

A role for leptin in sustaining lymphopoiesis and myelopoiesis.

Claycombe Kate K   King Louis E LE   Fraker Pamela J PJ  

Proceedings of the National Academy of Sciences of the United States of America 20080204 6


Although leptin is known for its regulation of food intake, it has many emerging roles in immune function. To better define the role of leptin in hematopoietic processes, a leptin-deficient obese mouse (ob/ob) and C57BL/6 lean wild-type controls were compared. Despite their large size and consumption of substantial amounts of nutrients, the ob/ob mice had only 60% as many nucleated cells in their marrow as controls. The greatest impact of leptin deficiency was on the B cell compartment that had  ...[more]

Similar Datasets

| S-EPMC7356667 | biostudies-literature
| S-EPMC2581854 | biostudies-other
| S-EPMC6162303 | biostudies-literature
| S-EPMC7006414 | biostudies-literature
2020-12-03 | GSE162603 | GEO
| S-EPMC2814863 | biostudies-literature
| S-EPMC3986148 | biostudies-literature
| S-EPMC5928662 | biostudies-literature
| S-EPMC7460646 | biostudies-literature
| S-EPMC6126011 | biostudies-literature