B-1a Lymphocytes Attenuate Insulin Resistance

B-1a Lymphocytes Attenuate Insulin Resistance

Obesity-associated insulin resistance, a common precursor of type 2 diabetes, is characterized by chronic inflammation of tissues, including visceral adipose tissue (VAT). Here we show that B-1a cells, a subpopulation of B lymphocytes, are novel and important regulators of this process. B-1a cells are reduced in frequency in obese high-fat diet (HFD)-fed mice, and EGFP interleukin-10 (IL-10) re...

B lymphocytes as emerging mediators of insulin resistance

Obesity is associated with chronic inflammation of various tissues including visceral adipose tissue (VAT), which contributes to insulin resistance. T cells and macrophages infiltrate VAT in obesity and orchestrate this inflammation. Recently, we made the surprising discovery that B cells are important contributors to this process. Thus, some B cells and the antibodies they produce can promote ...

Maintenance of Peritoneal B-1a Lymphocytes

A Common Origin for B-1a and B-2 Lymphocytes in Clonal Pre- Hematopoietic Stem Cells

Recent evidence points to the embryonic emergence of some tissue-resident innate immune cells, such as B-1a lymphocytes, prior to and independently of hematopoietic stem cells (HSCs). However, whether the full hematopoietic repertoire of embryonic HSCs initially includes these unique lineages of innate immune cells has been difficult to assess due to lack of clonal assays that identify and asse...

Adipose Tissue Lymphocytes and Macrophages in Obesity and Insulin Resistance

Obesity, and more specifically accumulation of adipose tissue in the visceral and subcutaneous abdominal locations, is a major risk factor for the development of cardiovascular pathologies including hypertension and atherosclerosis, as well as metabolic disorders such as type 2 diabetes. During recent years, “metaflammation” or metabolically-triggered inflammation1 has emerged as a key process ...