ImmunoX Faculty Directory

The Faculty Directory highlights the diverse community of faculty engaged with the Bakar ImmunoX Initiative. Use the filters to explore areas of expertise, connect across disciplines, and learn more about the people advancing immunology research and training at UCSF.

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Microbial Pathogenesis and Infectious Diseases
Leadership Committee
Anita Sil
The Sil Lab studies the fungal pathogen Histoplasma capsulatum, which is a soil organism that can infect and colonize cells of the innate immune system after inhalation into mammals. Their research is driven by two key questions. First, how do cells sense temperature and make a developmental switch from the soil to the host program? They focus on temperature because it is a sufficient signal to recapitulate the morphologic switch bettheyen Histoplasma filaments (the soil form) and yeast (the host form) in culture. This question is critical to understanding the basic biology of Histoplasma as theyll as a number of closely related fungi such as Blastomyces, Coccidioides, and Paracoccidioides, each of which is a ubiquitous pathogen of immunocompetent hosts in endemic areas. In fact, one of the fascinating evolutionary questions about these environmental fungi is how regulatory circuits have evolved to link morphology and virulence programs with growth at host is be an entry point to broader studies of host-fungal interactions, since it will define critical developmental changes that promote the expression of virulence traits, as theyll as delineate molecular landmarks that will allow us to stage the interactions of the fungus with host cells. Second, how does H. capsulatum defy the innate immune response to take up residence, often permanent, in immunocompetent hosts? The past ten years have witnessed an exponential increase in their understanding of the innate immune response to microbes, and yet, in the case of fungi, their insight is rudimentary at best. Their studies explore the molecular communication at the host-pathogen interface bettheyen H. capsulatum and the macrophage. H. capsulatum displays extremely robust macrophage colonization, so it is currently the best fungal candidate to probe the Achilles' heel of these powerful innate immune cells and determine novel mechanisms of virulence that have evolved in eukaryotic pathogens.
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Sil
Anita Sil
Professor and Department Chair
Autoimmunity
Member
Judith Ashouri-Sinha
The Ashouri lab is focused on understanding how aberrant immune cell signaling disrupts immune tolerance, resulting in autoimmune (AI) disease. We are particularly interested in T cell mechanisms that contribute to the onset of rheumatoid arthritis (RA), a debilitating disease affecting millions. A specific aim of the Ashouri lab is to identify antigen-activated T cells in RA in order to capture and profile arthritogenic clones and elucidate the earliest events in disease pathogenesis. Our work takes advantage of a specific reporter of T cell antigen receptor (TCR) signaling. Tracking the expression of this reporter of TCR signaling in murine and human T cells facilitates our ability to identify and study arthritis-causing T cells before and during RA disease development and addresses the following questions: 1) How are T cells that are relatively deficient TCR signaling able to mediate arthritis development? Our lab uses molecular and biochemical techniques to examine how chronic TCR signaling can enhance T cell sensitivity to cytokine signaling and its dysregulation in disease. 2) How are arthritis causing CD4 T cells initially triggered in disease and to what antigen do these T cells respond? We utilize multi-dimensional and high-throughput technologies including paired single-cell RNA and TCR-sequencing from mouse and human samples with significant potential to identify the TCR specificity, gene expression profile, and signaling networks of cells involved in antigen recognition in RA. Our model system provides a platform to track antigen-specific T cell responses in human diseases in which the inciting antigen is not known and could be broadly applied to other AI diseases, transplant rejection, cancer, and even checkpoint blockade.
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Sinha
Judith Ashouri-Sinha
Assistant Professor
Infection and Host Defense
Immunogenetics
Leadership Committee
Sara Suliman
The Suliman Lab builds on the foundation of previous human cohort studies to pursue the following directions:From systems biology to innate correlates of TB progression: 1) The lab is following up on candidate pathways identified through systems biology experiments performed on samples from human cohorts of TB progressors and healthy Mtb-exposed counterparts in Sub-Saharan Africa and South America. These genetic and transcriptional profiling studies point to candidate TB risk pathways including sodium/potassium ATPases and tyrosine metabolism enzymes in innate immune populations. The lab is functionally dissecting the roles of these genes using pharmacological inhibitors and CRISPR/Cas9 gene editing of primary human myeloid cells and Mtb infection experiments, followed by analysis of immunological and metabolic profiles, in order to define their roles in TB disease. 2) Point-of-care biomarkers to identify Mtb-exposed individuals at high risk of developing TB disease: Following previous studies on TB biomarkers and COVID-19 diagnostics, the lab leverages international collaborations and systems biology approaches to discover and validate easy-to-use biomarkers to identify individuals at high risk of progression to TB. The studies aim to down-select biomarkers with high accuracy for translation into point-of-care and near-patient prognostic biomarkers in diverse populations for active case finding, including those with other co-infections. 3) T cell immunity to SARS-CoV-2 and Mtb: The Severe Acute Respiratory Syndrome of Coronavirus-2 (SARS-CoV-2) and Mtb are the two leading causes of mortality from infectious diseases globally. Failure to contain SARS-CoV-2 can be a result of the evolution of escape mutations that evade T cell responses. Similarly, in TB, the activation states and memory phenotypes of T cells can determine the quality of adaptive immunity against Mtb. Therefore, the quality and breadth of T cell responses are critical determinants of protection against both pathogens. It is unclear how the co-infections with Mtb and SARS-CoV-2 influence the inflammatory milieu and antigen-specific T cell responses that correlate with protection from progression to TB disease or severe COVID-19. The Suliman lab studies antigen-specific T cell immunity to SARS-CoV-2 and Mtb in the context of co-infection with the two pathogens, evolving SARS-CoV-2 variants, and COVID-19 vaccine rollout.
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Suliman
Sara Suliman
Assistant Professor
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Associate
Hugo Gonzalez Velozo
The Gonzalez-Velozo Lab delves into the molecular mechanisms driving metastasis and tumor-host interactions. It is committed to advancing the understanding of cancer metastasis and the tumor microenvironment, particularly elucidating insights from the tumor-immune interface. The lab's studies integrate diverse disciplines, including cancer research, genomics, molecular biology, immunology, and computational biology. They include the first systematic study of human metastases at single-cell resolution and collaborations in areas such as crosstalk within the metastatic niche, tumor adaptation under stress in metastasis, and cancer immunology. Ongoing projects involve the study of chromatin accessibility at single-cell resolution, combined with single-cell transcriptomics, to define and characterize the gene regulatory networks (regulomes) that foster brain metastases from carcinomas in patients. Additionally, they are working on generating tumor-host assembloids, a novel tool that combines brain organoids derived from iPSCs with tumor organoids from brain metastases, aiming to study in vitro complex cellular circuits while preserving human biology in the system. Their work lies in the conceptual framework that metastatic fitness is intimately linked to cellular circuits and cell crosstalk within the metastatic niche, impacting both the composition and functional states of the tumor microenvironment.
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Velozo
Hugo Gonzalez Velozo
Assistant Adjunct Professor
Joel Ernst
joel-ernst

The Ernst Lab's research includes basic studies of mechanisms of immunity and immune evasion in TB using animal models, and human studies of immunity to TB. Using animal models, we have identified cellular and molecular mechanisms employed by M. tuberculosis to evade recognition and elimination by T cell responses, and have defined the dynamics of cell trafficking, differentiation, and infection in vivo, to identify check points for preventive and therapeutic intervention in TB. In performing these studies, we have discovered unexpected diversity in the phenotypes and functions of the cells infected by M. tuberculosis in vivo and that explain how M. tuberculosis survives and replicates in professional phagocytic cells. In human studies, we have discovered that in contrast to pathogens that employ antigenic variation to evade immunity and cause persistent infection, the human T cell antigens and epitopes of M. tuberculosis are highly conserved, even in strains that diverged from a common ancestor thousands of years ago. We have identified rare antigens of M. tuberculosis that show evidence of diversifying selection, and have initiated studies to test the hypothesis that T cell responses to those antigens are associated with superior protective immunity compared with T cell responses to conserved antigens.

Justin Eyquem
justin-eyquem

The Eyquem Lab is focusing on engineering T and NK cells to improve their anti-tumor activity in the context of an immunosuppressive tumor environment. We are studying CAR T and CAR NK cell function/dysfunction in immunocompetent mouse models using single-cell analysis and gene editing. We are also developing novel CAR designs, using genome and epigenome editing to better control T cell fate and ultimately overcome or remodel the tumor microenvironment.

John Fahy
john-fahy

The Fahy Lab focuses on investigations of disease biology in airway diseases such as asthma, CF and COPD. Using carefully collected biospecimens from well characterized research participants and a variety of ex vivo analyses and assays, we explore molecular phenotypes of disease with a view to improving precision based treatments. The emphasis of the lab is on asthma and we have a strong interest in type 2 immunity and how type 2 responses differ among patients and drive mucus gel pathology. Image-base quantification of airway mucus plugs and exploration of novel treatments for mucus occlusion of the airways are also areas of active investigation.

Marlys Fassett
marlys-fassett

The Fassett Lab's research program focuses upon understanding the tissue-centric and systemic neuroimmune biology of IL-31 in inflammatory skin diseases. IL-31 is expressed in a tiny number of immune cells, yet therapeutic blocking of its receptor results in impressive reduction in disease metrics in at least two chronic inflammatory skin conditions: atopic dermatitis and prurigo nodularis. Together, these findings suggest IL-31 is a tightly-regulated, highly-potent protein. Therefore, our current research goals are: A) to elucidate the gene regulation of IL-31; B) to rigorously characterize the rare IL-31-producing lymphocyte and non-lymphocyte populations in chronic skin inflammation; and C) to define disease-relevant contributions of IL-31-producing cells and IL-31-responsive cells in skin and other barrier organs.

Maggie Feeney
maggie-feeney

The Feeney Lab focuses on two of the greatest threats to children’s health worldwide, Malaria (1 million pediatric deaths annually) and HIV/AIDS (230,000 pediatric deaths annually). The broad goals of my research program are to identify correlates of protective immunity to HIV and malaria in order to guide the rational design of vaccines and immunomodulatory therapies. They are also interested in understanding how the immune response of infants and young children differs from that of adults, in order to optimize the immunogenicity of vaccines and other strategies targeting infants.

Sandy Feng
sandy-feng

The Feng Lab's research focuses on transplant immunology, with a particular focus on determinants of organ tolerance. We are also investigating novel immunosuppressive regimens and pursuing immunosuppression withdrawal in selected liver transplant recipients. By studying the immune profiles of transplant patients who are successfully weaned from immunosuppressants, we hope to predict prospectively which patients may be good candidates for immunosuppression withdrawal.

Trevor Fidler
trevor-fidler

The Fidler Lab is centered on understanding how hematopoietic cells, primarily macrophages (Mf), promote atherosclerosis. Mfs play a critical role in atherosclerosis by retaining lipids and modulating the inflammatory landscape shaping the local milieu. Their research will center on elucidating mechanisms by which dysfunctional Mfs promote atherosclerosis. The lab examines why clonal hematopoiesis (CH) driven by mutations in PPM1D and ASXL1 lead to increased cardiovascular disease. This aim has already received R00 funding to determine the impact of PPM1D truncation mutation on atherosclerosis. They have developed a model of ASXL1 CH using CRISPR-mediated gene editing in murine hematopoietic stem cells (HSC) to assess the contribution of Asxl1 mutations on atherosclerosis.

Studies of CH have underscored the importance of dysfunctional Mfs to atherosclerosis pathogenesis; therefore, they also aim to identify novel factors which promote the accumulation of Mfs in plaques. These studies expand on the lab's findings in mice modeling JAK2 CH where they found that the percent of Mfs harboring Jak2 mutations in lesions doubled relative to the burden of mutated monocytes in blood, indicating that either monocytes/Mfs with mutations enter the lesions at a higher rate, proliferate more, or survive longer than WT cells in the same mouse1. Here they utilize CRISPR genome-wide analysis to identify novel genes which may also promote the accumulation of Mfs in plaques. Together these projects aim to identify novel therapeutic approaches that could be deployed to suppress Mf dysfunction in atherosclerosis.

Gabriela Fragiadakis
gabriela-fragiadakis

Dr. Fragiadakis is the director of the Data Science CoLab, a collaboration-based research lab with an emphasis on complex data analysis and computational methods development. Our research program focuses on understanding immune state across disease contexts using high-dimensional immune profiling methods including single-cell RNAseq and CyTOF. In addition, we are passionate about data science training for biologists who want to better engage with their data. We also build tools for biologists to store and interact with their data, including our data library project. Our philosophy is that successful data-heavy projects happen by integrating biological understanding and intuition with advanced skills in data science. This can happen by facilitating close collaborations between experimental and computational biologists, as well as by empowering biologists to work with their own data.

James Gardner
james-gardner

The Gardner Lab has both a clinical focus in transplant surgery as well as a basic science focused Immunology lab in the UCSF Diabetes Center. Fundamentally, we are interested in understanding the basic mechanisms of self-tolerance in the adaptive immune system, and how characterizing that biology might eventually translate into improved therapeutics in autoimmunity, transplantation, and tumor immunotherapy. In particular our lab focuses on the biology and function of a unique population of dendritic cells expressing the Autoimmune Regulator (Aire) gene, and we have shown these cells to be potent inducers of immunologic tolerance.

Stephanie Gaw
stephanie-gaw

The Gaw Lab focuses on the placental response to perinatal infections and biological correlates of clinical outcomes from a histopathologic and molecular approach. We have three main lines of research in our laboratory- malaria in pregnancy, Zika infection in the placenta, and SARS-CoV2 infection in pregnancy. All areas are unified by the goal of understanding how inflammatory responses at the maternal-fetal interface influence pregnancy outcomes. Our work leverages unique patient samples prospectively collected in endemic regions through successful collaborations, and have great potential to bridge the gap between molecular technologies, human responses to infection, and clinical outcomes. These studies will identify novel mechanisms of pathogenesis and potential pathways for therapeutic intervention to prevent the adverse consequences of these perinatal infections.

Andrei Goga
andrei-goga

The Goga Lab’s research focuses on three main immunological goals: First, their lab studies basic aspect of cancer biology, including how do specific oncogenes alter tumor-immune interactions. For example, they have discovered that MYC-driven breast cancers may regulate the tumor microenvironment via cell intrinsic and extrinsic effects. They are currently exploring how extracellular vesicle (EV) contents of MYC-driven breast tumors effect the composition of tumor immune composition. Secondly, their group explores patient response to combined targeted and immune therapies as participants in several clinical trials. Third, they explore in cancer and immune metabolic alterations, which may be new anti-cancer therapeutic approaches.

Emily Goldberg
emily-goldberg

The Goldberg Lab studies how crosstalk between the immune and metabolic systems coordinates immune function, inflammation, and chronic disease. Specifically, they propose a bi-directional circuit in which (a) immune cell activation and inflammatory potential is dictated by the metabolic environment, and (b) immune cells modify metabolic organ function to impact systemic metabolic health.