Issues
PRESIDENT’S ADDRESS
TOP READS
BRIEF REVIEWS
T Cell Cytokines Impact Epithelial Cell Responses during Helicobacter pylori Infection
CUTTING EDGE
Cutting Edge: Antitumor Immunity by Pathogen-Specific CD8 T Cells in the Absence of Cognate Antigen Recognition
Pathogen-specific bystander memory CD8 T cells infiltrate tumors in the absence of Ag.
1°M bystander CD8 T cells are relatively inert in the tumor.
4°M bystander cells gain effector functions independent of cognate Ag recognition.
ALLERGY AND OTHER HYPERSENSITIVITIES
Airway Epithelial cGAS Is Critical for Induction of Experimental Allergic Airway Inflammation
Airway epithelial cGAS plays a key role in asthma pathogenesis.
cGAS may be a promising target against allergic airway inflammation.
AUTOIMMUNITY
Tris DBA Ameliorates Accelerated and Severe Lupus Nephritis in Mice by Activating Regulatory T Cells and Autophagy and Inhibiting the NLRP3 Inflammasome
Tris DBA ameliorates lupus nephritis in a murine lupus model.
Tris DBA regulates the NLRP3 inflammasome by blunting MAPK and enhancing autophagy.
Tris DBA enhances Treg cell function and inhibits DC-mediated T cell activation.
CLINICAL AND HUMAN IMMUNOLOGY
Reconstitution of Circulating Mucosal-Associated Invariant T Cells after Allogeneic Hematopoietic Cell Transplantation: Its Association with the Riboflavin Synthetic Pathway of Gut Microbiota in Cord Blood Transplant Recipients
The number of MAIT cells significantly correlated with time after CBT.
Significantly decreased numbers of circulating MAIT cells were observed in patients with cGVHD.
The riboflavin pathway of microbiomes correlated with MAIT cell reconstitution.
IMMUNE REGULATION
Nonclassical Monocytes Sense Hypoxia, Regulate Pulmonary Vascular Remodeling, and Promote Pulmonary Hypertension
Ly6Clo nonclassical monocytes infiltrate the pulmonary vasculature and promote PH.
Hif1α regulates the maturation of nonclassical monocytes into infiltrating IMØ.
Infiltrating IMØ promote PH by modulating local immune and cytokine responses.
IL-13 Ameliorates Neuroinflammation and Promotes Functional Recovery after Traumatic Brain Injury
IL-13 improves neurologic outcomes after traumatic brain injury.
IL-13 adjusts microglia/macrophage phenotypes and inhibits inflammatory responses.
IL-13 enhances microglia/macrophage phagocytic activities.
TRIM25 Promotes TNF-α–Induced NF-κB Activation through Potentiating the K63-Linked Ubiquitination of TRAF2
TRIM25 functions as a positive regulator in NF-κB signaling in response to TNF-α.
TRIM25 interacts with TRAF2 and enhances its K63-linked polyubiquitination.
TRIM25 promotes the interaction between TRAF2 and TAK1 or IKKβ.
BAFF Produced by Neutrophils and Dendritic Cells Is Regulated Differently and Has Distinct Roles in Antibody Responses and Protective Immunity against West Nile Virus
BAFF increases in myeloid subsets in a cell- and tissue-specific manner.
Neutrophil and DC BAFF are required for optimal T cell–independent 2 humoral responses.
BAFF produced by DCs is required for protective immunity to West Nile virus.
IMMUNE SYSTEM DEVELOPMENT
Critical Role for SLAM/SAP Signaling in the Thymic Developmental Programming of IL-17– and IFN-γ–Producing γδ T Cells
γδ T cell subsets possess distinct SLAM family receptor coexpression profiles.
SLAMF1 and SLAMF6 identify IL-17– and IFN-γ–producing γδ T cells, respectively.
SAP regulates the development of both IL-17– and IFN-γ–producing γδ T cell subsets.
E3 Ubiquitin Ligase Fbw7 Regulates the Survival of Mature B Cells
Loss of Fbw7 during B cell development reduces mature B1 and B2 cells.
Fbw7 controls survival pathway signaling to prevent apoptosis in mature B cells.
Ectopic expression of BCL2 partially overcomes apoptosis upon Fbw7 deficiency.
IMMUNOTHERAPY AND VACCINES
HIV-1 gp120–CD4-Induced Antibody Complex Elicits CD4 Binding Site–Specific Antibody Response in Mice
The receptor binding site (CD4bs) of HIV Env is a desirable vaccine target.
Envs lacking CD4bs-flanking glycans and bearing CD4i Ab moieties were generated.
CD4bs-directed Ab responses have been elicited by these modified Envs.
Toxoplasma gondii tkl1 Deletion Mutant Is a Promising Vaccine against Acute, Chronic, and Congenital Toxoplasmosis in Mice
Vaccination with RHΔtkl1 in mice induces a strong humoral and cellular response.
RHΔtkl1-vaccinated mice are protected against acute, chronic, and congenital toxoplasmosis.
Immunity induced by RHΔtkl1 vaccine is primarily Th1 biased and CD8+ T cell mediated.
INFECTIOUS DISEASE AND HOST RESPONSE
In Silico Guided Discovery of Novel Class I and II Trypanosoma cruzi Epitopes Recognized by T Cells from Chagas’ Disease Patients
Novel T. cruzi T cell epitopes were identified by immunoinformatics and immunoassaying.
Six class II and 1 class I epitopes activate T cells from chronic Chagas patients.
Epitope-specific T cells have different memory phenotype across donors.
α2β1 Integrin Is Required for Optimal NK Cell Proliferation during Viral Infection but Not for Acquisition of Effector Functions or NK Cell–Mediated Virus Control
α2β1 deficiency does not alter the balance of NK cell/ILC1 generation.
α2β1 deficiency does not alter NK cell maturation.
α2β1-deficient NK cells efficiently protect from lethal mousepox and control MCMV.
INNATE IMMUNITY AND INFLAMMATION
Endogenous IL-33 and Its Autoamplification of IL-33/ST2 Pathway Play an Important Role in Asthma
IL-33 autoamplifies the IL-33/ST2 pathway by inducing its own and ST2 expression.
Airway epithelial cells are the major source of endogenous IL-33 production.
An intact endogenous IL-33/ST2 pathway is necessary for asthma-like mouse models.
C1q/TNF-Related Protein 6 Is a Pattern Recognition Molecule That Recruits Collectin-11 from the Complement System to Ligands
CTRP6 binds selectively to ligands, carbohydrates, and live bacteria.
CTRP6 guides collectin-11 to surfaces and facilitates complement activation.
Dysregulated NADPH Oxidase Promotes Bone Damage in Murine Model of Autoinflammatory Osteomyelitis
NADPH oxidase hyperactivity accompanies autoinflammation in Pstpip2cmo mice.
This hyperactivity is cell intrinsic and not caused by an inflamed environment.
NADPH oxidase deletion prevents autoinflammatory bone damage in Pstpip2cmo mice.
MOLECULAR AND STRUCTURAL IMMUNOLOGY
Activation of Dendritic Cells Alters the Mechanism of MHC Class II Antigen Presentation to CD4 T Cells
MHC-II recycling through early endosomes in mature DCs is regulated by Rab11a.
MHC-II synthesis enhances presentation of late endosome Ags by immature DCs.
MHC-II recycling enhances presentation of early endosome Ags by mature DCs.
A Newly Recognized Pairing Mechanism of the α- and β-Chains of the Chicken Peptide–MHC Class II Complex
The chicken pBL2*019:01 structure reveals a conserved α- and β-chain–pairing mechanism.
The variable β1 domain of chicken MHC-II determines peptide-presentation profiles.
The interaction between pBL2*019:01 and CD4 differs from the corresponding pMHC-II.
Cooperative Regulation of the Mucosal Mast Cell–Specific Protease Genes Mcpt1 and Mcpt2 by GATA and Smad Transcription Factors
The MMC-specific genes Mcpt1 and Mcpt2 are induced by TGF-β.
The GATA–Smad motifs around −3 kb of these genes are crucial for transcription.
TGF-β–Smad2/4 axis accelerates GATA2 recruitment to the GATA–Smad motifs.
MUCOSAL IMMUNOLOGY
Ablation of IL-33 Suppresses Th2 Responses but Is Accompanied by Sustained Mucus Obstruction in the Scnn1b Transgenic Mouse Model
IL-33 mediates eosinophilic recruitment and Th2 inflammation in Tg+ airways.
MUC5AC, not MUC5B, is significantly suppressed in the airways of IL-33KO/Tg+ mice.
Mucous cell density, not muco-obstruction, is suppressed in IL-33KO/Tg+ airways.
SYSTEMS IMMUNOLOGY
Seasonal Variability and Shared Molecular Signatures of Inactivated Influenza Vaccination in Young and Older Adults
Consistent transcriptional signatures were identified 28 d after influenza vaccination.
A new end point (maxRBA) characterizes Ab response relative to baseline.
Genes related to Ab response behave differently in young and older adults.
TRANSPLANTATION
GCNT1-Mediated O-Glycosylation of the Sialomucin CD43 Is a Sensitive Indicator of Notch Signaling in Activated T Cells
Notch signaling regulates Gcnt1-mediated core-2 O-glycosylation in activated T cells.
The core-2 O-glycoform of CD43 reports Notch signals in multiple mouse T cell subsets.
NOVEL IMMUNOLOGICAL METHODS
High-Throughput Identification of MHC Class I Binding Peptides Using an Ultradense Peptide Array
Historical CD8 T cell epitope discovery methods are labor intensive and scale poorly.
Ultradense peptide arrays can streamline identification of MHC binding peptides.
Substitution arrays can be used to define MHC molecules’ binding motifs.
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Cover Image
Cover Image
On the cover: Flow cytometry biaxial plot showing T cells specific for a Trypanosoma cruzi epitope (red) overlaid on the density distribution of central memory (blue), effector memory (yellow), effector memory re-expressing CD45RA (green) and naive (purple) T cells, according to their expression of CD45RA and CCR7. Acevedo, G.R., N. A. Juiz, A. Ziblat, L. P. Perri, M. C. Girard, M. S. Ossowski, M. Fernández, Y. Hernández, R. Chadi, M. Wittig, A. Franke, M. Nielsen, and K. A. Gómez. 2020. In silico guided discovery of novel class I and II Trypanosoma cruzi epitopes recognized by T cells from Chagas’ disease patients. J. Immunol. 204: 1571–1581.
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