Abstract: Provided are compositions and methods for maintaining intestinal immune homeostasis. The method comprises administering to an individual an effective amount of a VIPR2 inhibitor. The method may modulate gut resident CCR6+ ILC3 cell function.

Abstract: Provided are compositions and methods for identifying agents that can modulate IL-17 receptors. The compositions and methods use modified cells that produce a detectable signal that indicates whether or not a test agent is an agonist or antagonist of and IL-17 receptor.

Abstract: Steroid compounds are disclosed that have a formula represented by the following: (I) and wherein R1, R2, R3a, R3b, R4a, R4b, R5, R6a, R6b, R7, R8, and n are as described herein. The compounds may be prepared as pharmaceutical compositions, and may be used for promoting differentiation of T regulatory (Treg) lymphocytes, and for the prevention and treatment of a variety of conditions in mammals including humans, including by way of non-limiting example, inflammatory conditions, autoimmune disorders, and graft-versus-host disease.

Abstract: Provided are compositions and methods for maintaining intestinal immune homeostasis. The method comprises administering to an individual an effective amount of a VIPR2 inhibitor. The method may modulate gut resident CCR6+ ILC3 cell function.

Abstract: Provided is a method for identifying and reducing the risk of a female subject producing an offspring having a neurodevelopmental disorder. The method comprises detecting in the subject the presence of gut bacteria that promote Th17 cell biogenesis. If such bacteria are detected, the individual can be administered a therapy that inhibits the growth or Th17 cell biogenesis promoting activity of the bacteria, and/or reduces the activity of the Th17 cells in the gut.

Abstract: Methods, agents and compositions thereof for treating psoriatic arthritis (PsA) are encompassed herein.

Abstract: The present invention provides a method for reducing the risk of developing a psychiatric disorder (e.g., ASD, of which autism is a particular example) in a fetus comprising administering an inhibitor of T helper 17 (Th17) cell activity to the mother of the fetus, while the mother is pregnant with the fetus. The invention further relates to the use and application of compounds or agents that inhibit Th17 activity or that inhibit IL-17a or IL-17 signaling for reducing fetal risk for developing a psychiatric disorder. The invention relates to compounds or agents that inhibit Th17 activity or that inhibit IL-17a for reducing fetal risk for developing a psychiatric disorder, such as ASD, and use of such compounds or agents in the preparation of a medicament for reducing fetal risk for developing a psychiatric disorder.

Abstract: Methods and compositions for treating inflammatory bowel disease by promoting mucosal healing in the gastrointestinal (GI) tract are encompassed herein. More particularly, methods and compositions described herein relate to agents that activate mononuclear phagocytes (MNPs) in the GI tract and, in turn, regulate the activity of interleukin (IL)-22-producing group 3 innate lymphoid cells (ILC3) in close proximity thereto.

Abstract: Methods are presented herein for reducing the risk of developing a psychiatric disorder (e.g., autism like disorder) in a fetus involving administering an inhibitor of T helper 17 (Th17) cell activity to the mother of the fetus, while the mother is pregnant with the fetus at risk. Also encompassed herein is a method for treating a fetus in utero to reduce the risk of abnormal cortical development that arises from Th17 cell-mediated activity.

Abstract: Methods, reagents and compositions thereof for predicting RA onset in susceptible individuals, diagnosing RA onset, and/or evaluating efficacy of a therapeutic regimen for treating RA are described herein. Determining the amount of a particular bacterial species comprising SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3 (SEQ ID NO: 1+ bacteria) serves as a biomarker for the above indications.

Abstract: Methods for treating subjects afflicted with a psychiatric disorders [e.g., autism spectrum disorder (ASD), schizophrenia, and/or depression] are described herein. More particularly, the present invention relates to a method for treating a subject afflicted with or at risk for developing a psychiatric disorder (e.g., ASD, of which autism is a particular example) that calls for selecting a subject afflicted with or at risk for developing the psychiatric disorder based in part on previous in utero exposure to maternal immune activation (MIA) and treating the subject by administering pharmacological agents or implementing optogenetic tools or chemogenetic tools that correct dysregulated neuronal excitation/inhibition (E/I) ratios in cortical patches of the subject wherein the E/I ratio is dysregulated. A subject may also be selected for treatment using methods described herein based on the presence or detection of cortical patches having dysregulated neuronal E/I ratios.

Abstract: Methods for screening to identify agents capable of modulating DDX5 polypeptide activity are encompassed herein as are methods for using such agents to treat subjects afflicted with TH17-mediated inflammatory conditions and autoimmune diseases including, without limitation, Crohn's disease, ulcerative colitis, multiple sclerosis, rheumatoid arthritis, and psoriasis and methods for using such agents to treat subjects afflicted with cancer.

Abstract: Steroid compounds are disclosed that have a formula represented by the following: and wherein m, n, t, u1, u2, v1, v2, R1a, R1b, R2a, R2b, R3a, R3b, R3c, R3d, and Y are as described herein. The compounds may be prepared as pharmaceutical compositions, and may be used for the treatment or prevention of a variety of conditions in mammals including humans, including by way of non-limiting example, inflammatory conditions, autoimmune disorders, cancer, and graft-versus-host disease.

Abstract: The present invention is directed to an in vitro method for promoting differentiation and proliferation of human T helper lymphocytes that express IL17 (Th-IL17+ cells). The instant method may be used to generate a population of human T helper lymphocytes that express IL17 (Th-IL17+ cells) in vitro. Methods for screening to identify agents capable of modulating Th-IL17+ cell differentiation are also encompassed by the present invention. Isolated, pure populations of homogeneous Th-IL17+ cells that do not express cellular markers characteristic of Th1, Th2, or Treg cells are also encompassed herein.

Abstract: Methods are presented herein for reducing the risk of developing a psychiatric disorder (e.g., autism like disorder) in a fetus involving administering an inhibitor of T helper 17 (Th17) cell activity to the mother of the fetus, while the mother is pregnant with the fetus at risk. Also encompassed herein is a method for treating a fetus in utero to reduce the risk of abnormal cortical development that arises from Th17 cell-mediated activity.

Abstract: Methods, reagents and compositions thereof for predicting RA onset in susceptible individuals, diagnosing RA onset, and/or evaluating efficacy of a therapeutic regimen for treating RA are described herein. Determining the amount of a particular bacterial species comprising SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3 (SEQ ID NO: 1+bacteria) serves as a biomarker for the above indications.

Abstract: Methods, reagents and compositions thereof for predicting risk for NORA onset in susceptible individuals, diagnosing NORA onset, and/or evaluating efficacy of a therapeutic regimen for treating RA are described herein. Determining the amount of at least one of SEQ ID NOs: 1-19 and/or at least one of a KO presented in either of Tables S4 or S5 serves as a biomarker for the above indications.

Abstract: The present invention is directed to in vitro methods for promoting expression of G-protein coupled receptor 15 (GPR15) on T cells, GPR15+ enriched populations of T cells generated using these methods and compositions thereof, as well as methods of using these T cell populations for therapeutic purposes.

Abstract: Methods, agents and compositions thereof for treating psoriatic arthritis (PsA) are encompassed herein.

Abstract: Methods and compositions for treating inflammatory bowel disease by promoting mucosal healing in the gastrointestinal (GI) tract are encompassed herein. More particularly, methods and compositions described herein relate to agents that activate mononuclear phagocytes (MNPs) in the GI tract and, in turn, regulate the activity of interleukin (IL)-22-producing group 3 innate lymphoid cells (ILC3) in close proximity thereto.