Regulating the balance between T_H17 cells that drive autoimmune inflammation and nonpathogenic T_H17 cells is critical for limiting autoimmune pathology. Here, the authors extensively characterize these two cell states at the transcriptomic and epigenetic levels and show how BACH2 is protective in this context.

Muppidi and colleagues show that loss of Gα13 drives B cell lymphomas preferentially in the mesenteric lymph nodes. They find that Gα13 is required to counteract mTORC1 and Myc signaling that is driven by the availability of dietary glutamine.

In this study, Uldrich and colleagues describe the crystal structure of the Vγ9Vδ2 T cell antigen receptor (TCR) interacting with BTN2A1 and demonstrate the existence of a second ligand that co-binds to a distinct epitope on Vγ9Vδ2 TCR. Using these data, the authors suggest a model of Vγ9Vδ2 TCR activation in which BTN2A1 and BTN3A1 are tethered to each other at the steady state, and must disengage to allow TCR binding.

In this Review, the author outlines the complex immunology of systemic lupus erythematosus and how to treat it.

Here, the authors show that there is a pretumorigenic T_H17 subset in the intestines that can convert to being tumorigenic under the control of KLF6 and that this process can be prevented by TGFβ1 production from intestinal epithelial cells.

Vinuesa et al. identify patients with systemic autoimmunity and a TNIP1 variant that result in dysregulated B cell function. Mice with the orthologous Tnip1 mutation develop spontaneous autoimmunity associated with impaired mitophagy and autophagic silencing of proteins downstream of Toll-like receptor 7 signaling.

Muppidi and colleagues show that loss of Gα13 drives B cell lymphomas preferentially in the mesenteric lymph nodes. They find that Gα13 is required to counteract mTORC1 and Myc signaling that is driven by the availability of dietary glutamine.

In this study, Uldrich and colleagues describe the crystal structure of the Vγ9Vδ2 T cell antigen receptor (TCR) interacting with BTN2A1 and demonstrate the existence of a second ligand that co-binds to a distinct epitope on Vγ9Vδ2 TCR. Using these data, the authors suggest a model of Vγ9Vδ2 TCR activation in which BTN2A1 and BTN3A1 are tethered to each other at the steady state, and must disengage to allow TCR binding.

Regulating the balance between T_H17 cells that drive autoimmune inflammation and nonpathogenic T_H17 cells is critical for limiting autoimmune pathology. Here, the authors extensively characterize these two cell states at the transcriptomic and epigenetic levels and show how BACH2 is protective in this context.

Seshadri, Davis and colleagues show that individuals who do not develop an infection with Mycobacterium tuberculosis (Mtb), despite exposure to the bacteria and expansion of CD4⁺ T cell clones specific to Mtb antigens, show enrichment of T_H17 cell and T regulatory functional programs.