We are devoted to developing and deploying cutting edge technologies that can be used to define human immune responses. Much of our work leverages ‘next generation’ DNA sequencing, which enables massively parallel molecular measurements. Examples of our technologies include: - bacteriophage display of synthetic peptidome libraries for comprehensive, quantitative profiling of antibodies; - display of ORFeome libraries for antigen discovery, protein-protein interaction studies, and drug target identification; - ultrasensitive, multiplex RNA quantification techniques to monitor gene expression and detect microbes; - pooled genetic screening to elucidate immune cell function and identify new therapeutic targets. The Larman Laboratory uses these and other approaches to identify opportunities for monitoring and manipulating immune responses.

The Ted Dawson Laboratory uses genetic, cell biological and biochemical approaches to explore the pathogenesis of Parkinson's disease (PD) and other neurologic disorders. We also investigate several discrete mechanisms involved in cell death, including the role of nitric oxide as an endogenous messenger, the function of poly (ADP-ribose) polymerase-1 and apoptosis inducing factor in cell death, and how endogenous cell survival mechanisms protect neurons from death.

The O'Connor Lab studies the molecular basis of infectious disease using Legionella pneumophila pathogenesis as a model system. We are looking at the network of molecular interactions acting at the host-pathogen interface. Specifically, we use L. pneumophila pathogenesis to examine the numerous mechanisms by which an intracellular bacterial pathogen can establish infection, how it exploits host cell machinery to accomplish this, and how individual proteins and their component pathways coordinately contribute to disease. We are also studying the role of environmental hosts in the evolution of human pathogens. Using genetics and functional genomics, we compare and contrast the repertoires of virulence proteins required for growth in a broad assortment of hosts, how the network of molecular interactions differs between hosts, and the mechanisms by which L. pneumophila copes with this variation.

Current research in the Sean T. Prigge Lab explores the biochemical pathways found in the apicoplast, an essential organelle found in malaria parasites, using a combination of cell biology and genetic, biophysical and biochemical techniques. We are particularly focused on the pathways used for the biosynthesis and modification of fatty acids and associated enzyme cofactors, including pantothenate, lipoic acid, biotin and iron-sulfur clusters. We want to better understand how the cofactors are acquired and used, and whether they are essential for the growth of blood-stage malaria parasites.

The Systems neurobiology Laboratory is a group of laboratories that all study various aspects of neurobiology. These laboratories include: (1) computational neurobiology Laboratory: The goal of their research is to build bridges between brain levels from the biophysical properties of synapses to the function of neural systems. (2) computational Principles of Natural Sensory Processing: Research in this lab focuses on the computational principles of how the brain processes information. (3) Laboratory for Cognitive neuroscience: This laboratory studies the neural and genetic underpinnings of language and cognition. (4) Sloan-Swartz Center for Theoretical neurobiology: The goal of this laboratory is develop a theoretical infrastructure for modern experimental neurobiology. (5) Organization and development of visual cortex: This laboratory is studying the organization and function of neural circuits in the visual cortex to understand how specific neural components enable visual perception and to elucidate the basic neural mechanisms that underlie cortical function. (6) Neural mechanism of selective visual attention: This laboratory studies the neural mechanisms of selective visual attention at the level of the individual neuron and cortical circuit, and relates these findings to perception and conscious awareness. (7) Neural basis of vision: This laboratory studies how sensory signals in the brain become integrated to form neuronal representation of the objects that people see.

The Peter van Zijl Laboratory focuses on developing new methodologies for using MRI and magnetic resonance spectroscopy (MRS) to study brain function and physiology. In addition, we are working to understand the basic mechanisms of the MRI signal changes measured during functional MRI (fMRI) tests of the brain. We are also mapping the wiring of the brain (axonal connections between the brains functional regions) and designing new technologies for MRI to follow where cells are migrating and when genes are expressed. A more recent interest is the development of bioorganic biodegradable MRI contrast agents. Our ultimate goal is to transform these technologies into fast methods that are compatible with the time available for multi-modal clinical diagnosis using MRI.

The Abadir Lab focuses on uncovering the molecular mechanisms underlying frailty, resilience, and age-related diseases to bridge the gap between basic science and clinical applications. Grounded in translational research, the lab investigates the intricate interplay between mitochondrial biology, the renin-angiotensin system (RAS), and chronic inflammation, with an emphasis on their roles in physical and cognitive decline.

Key Areas of Research

1. Mitochondrial and Angiotensin Biology
   • Discovery and exploration of the mitochondrial angiotensin system (MAS) as a critical regulator of cellular energy, inflammation, and resilience.
   • Investigating age-related mitochondrial dysfunction and its contribution to frailty, chronic inflammation, and neurodegeneration.
2. Biomarker Development
   • Identification of novel biomarkers for aging-related frailty and resilience, including cell-free DNA fragments and kynurenine metabolites.
   • Development of diagnostic tools for early detection of physical and cognitive decline.
3. Innovative Therapeutics and Bioengineering
   • Designing nano-delivery systems for targeted drug delivery to mitochondria, enhancing wound healing and reversing cellular senescence.
   • Integration of artificial intelligence and engineering to create advanced diagnostic tools for assessing frailty and aging-related conditions.
4. AI and Technology in Aging
   • Leveraging artificial intelligence and bioengineering to address challenges in geriatric medicine through collaborations with the Johns Hopkins AI & Technology Collaboratory for Aging Research (AITC) and the Gerotech Incubator Program.

Our Approach

The Abadir Lab employs a multidisciplinary methodology, combining molecular biology, bioinformatics, and engineering to tackle the pressing health challenges of aging populations. By fostering collaboration between clinicians, scientists, and engineers, the lab ensures that discoveries translate into tangible benefits for older adults.

Translational Impact

With a focus on frailty, inflammation, and cognitive decline, the Abadir Lab contributes to the development of personalized interventions and precision medicine approaches. Our work has laid the foundation for:

• Repurposing drugs like losartan and valsartan for treating aging-related chronic wounds.
• Unveiling the role of mitochondrial dysregulation in Alzheimer’s disease and frailty.
• Innovating tools for clinical assessments of resilience and functional decline.

Collaborations and Mentorship

The Abadir Lab is committed to training the next generation of scientists, fostering an interdisciplinary environment where students and postdocs explore cutting-edge aging science. Collaborations with the Johns Hopkins GeroTech Incubator Program and the Translational Aging Research Training Program (T32) further enrich this ecosystem of innovation.

Join Us

Whether you're a researcher, student, or collaborator, the Abadir Lab welcomes individuals passionate about transforming aging research into clinical practice.

The lab’s assets include three MRI systems available for pediatric studies, cardiac imaging processing, cardiovascular imaging and therapeutic ultrasound. A robust echocardiogram program conducts 10,000 transthoracic echocardiograms and 1,300 fetal echocardiograms per year, and maintains a database with 10 years of data.

The Aliaksei Pustavoitau Lab conducts research on models and mechanisms of impaired consciousness in patients who have suffered acute brain injury. Examples of our work include a study on the mechanisms of neurologic failure in critical illness and another on the use of intensivist-driven ultrasound at the PICU bedside. We also have a longstanding interest in patient safety and quality of care in the ICU setting.

Research in the Janet Record Lab focuses on medical education and patient-centered care. We’re currently developing a curriculum for internal medicine residents in the inpatient general medicine service setting. The curriculum teaches residents to use hand-carried ultrasound for imaging the inferior vena cava to assess volume status.