Bacterial transfer-messenger RNA activates antiviral RNA sensing to induce inflammatory innate immune responses

J Immunol. 2026 Jun 7;215(6):vkag149. doi: 10.1093/jimmun/vkag149. ABSTRACT Pathogen-derived RNAs function as pathogen-associated molecular patterns (PAMPs) that activate innate immune responses through pattern recognition receptors (PRRs). While viral RNA is well established as a trigger of antiviral immunity, the identity of bacterial RNA species that function as immunostimulatory ligands and the host PRRs that recognize … Read more

Disease progression is associated with differential neutrophil maturation in Mycobacterium tuberculosis-infected macaques

J Immunol. 2026 Jun 7;215(6):vkag114. doi: 10.1093/jimmun/vkag114. ABSTRACT Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), is associated with clinical diversity and outcomes ranging from latent TB to active TB with distinct pathophysiologies. However, our understanding of the innate immune mechanisms related to the protection or progression of TB is limited. Among innate immune cells, the … Read more

BPTF is essential for vaccine-induced germinal center B cell responses

J Immunol. 2026 Jun 7;215(6):vkag126. doi: 10.1093/jimmun/vkag126. ABSTRACT Germinal centers (GCs) are microanatomical structures in which antigen-specific B cells undergo proliferation, somatic hypermutation, and affinity-based competition to select high-affinity clones that differentiate into memory B cells and plasma cells (PCs). B cell progression through the GC is tightly regulated, and the molecular determinants that modulate … Read more

Mechanisms and functions of intercellular mitochondria transfer to and from macrophages

J Immunol. 2026 Jun 7;215(6):vkag147. doi: 10.1093/jimmun/vkag147. ABSTRACT Cell-to-cell communication is essential for maintaining homeostasis and coordinating complex biological processes in multicellular organisms. Classically, cells communicate using secreted peptides and metabolites and through cell contact-dependent signaling. Emerging studies over the past 20 years indicate that many cell types, including innate immune cells such as macrophages, … Read more

Transmembrane orientation and extracellular juxtamembrane residues of GP130 are critical for signal transduction

J Immunol. 2026 Jun 7;215(6):vkag118. doi: 10.1093/jimmun/vkag118. ABSTRACT Glycoprotein 130 (GP130) is an archetypal class I cytokine receptor that serves as a shared signalling subunit for a group of cytokines known as interleukin 6 (IL-6)-type cytokines. GP130 does not have an intrinsic kinase activity and relies on Janus kinases (JAK) 1, 2, or Tyrosine kinase … Read more

Increased ULBP1 by doxorubicin sensitizes neuroblastoma to γδT-cell cytotoxicity

J Immunol. 2026 Jun 7;215(6):vkag144. doi: 10.1093/jimmun/vkag144. ABSTRACT Neuroblastoma (NB) is the most common extracranial solid tumor in children and remains a major therapeutic challenge in high-risk patients because of frequent recurrence and metastasis. γδT cells are a unique lymphocyte subset with potent antitumor activity and are widely distributed in NB tumors. However, the immunosuppressive … Read more

Mitochondrial potential reflects T cell fitness and function during cancer immunotherapy

J Immunol. 2026 Jun 7;215(6):vkag120. doi: 10.1093/jimmun/vkag120. ABSTRACT Checkpoint inhibitors have transformed cancer treatment, yet predicting responses remains challenging. Mitochondrial quality decreases in tumor infiltrating lymphocytes and correlates with impaired antitumor immunity in animal models. Mitochondrial membrane potential (MMP) increases with T cell activation and may also indicate cellular dysfunction. Here, we assessed the MMP … Read more

Compensatory relationships determine the impact of TGF-β on the humoral immune response to hepatitis B surface antigen

J Immunol. 2026 Jun 7;215(6):vkag129. doi: 10.1093/jimmun/vkag129. ABSTRACT Despite an effective vaccine against the hepatitis B virus (HBV), there are about 250 million people living with chronic HBV (CHB) worldwide and one million deaths annually. Most children and about 5% of adults exposed to HBV will fail to clear the virus, developing a lifelong infection. … Read more

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