We are studying the role of serotonin neurons in mediating the effects of acidosis on brain function and behavior. We have shown that serotonin neurons are exquisitely sensitive to changes in pH. They are close to large arteries in the brain and contribute to the increase in breathing induced by...

Serotonin neurons are mainly localized to the raphe nuclei of the brainstem, but their axons are widely distributed throughout the nervous system and have a ubiquitous role in physiological processes and behavior. Adding to this complexity is the diverse array of high-affinity receptors that bind...

Sudden unexpected death in epilepsy (SUDEP) is the leading cause of death in patients with intractable epilepsy, but specific mechanisms of how a seizure can cause death are poorly understood. Research efforts in my laboratory are focused on using animal models to understand the mechanisms by which...

Homeostasis is a robust form of regulation that allows a system to maintain a constant output despite external perturbations. In the nervous system, homeostasis plays a critical role in regulating neuronal and synaptic activity. Yet the molecular basis of this form of neural plasticity is generally...

My research interest is the molecular basis of migraine. A hallmark of migraine is altered sensory perception coupled with head pain. To understand the mechanisms underlying these events, we have focused on the neuropeptide calcitonin gene-related peptide (CGRP), whose levels are elevated during...

A high concentration of free ionic zinc in synaptic vesicles is a prominent feature of some of the excitatory pathways in the mammalian forebrain. Despite the wealth of information on its distribution, and role in metalloenzymes and proteins, the role of vesicular zinc remains enigmatic, and serves...

My laboratory is interested in the effect of environmental pollutants, such as neurotoxic polychlorinated biphenyls (PCBs), and their transformation products on the developing brain. We use exposomics approaches to identify the metabolites formed in various model systems, including animal models...

We study the neural circuits and intraneuronal signaling mechanisms that regulate appetite, body weight, sleep, and cardiorespiratory function in mice and aim to understand how these regulatory processes go awry in metabolic disorders. To this end, we employee state-of-the-art neuroscience...

My research focuses on elucidating central brain mechanisms underlying Alzheimer’s disease, psychosocial disorders, heart failure and sudden cardiac death. The lab uses multidisciplinary approaches including radiotelemetry, optogenetics, neurophysiology, pharmacology, behavioral and molecular...

We combine behavioral, physiological, functional neuroanatomical, and cellular approaches to unravel the neural circuitry that underlies adaptive neuroendocrine responses to stress. Recently we have identified a locus in the basal forebrain that serves as a neural hub for integrating and relaying...

In the lab, we use genetic techniques to isolate and manipulate neurons that mediate basic physiologic functions including sleep, appetite, bladder control, and thermoregulation. My focus lies in identifying and deciphering previously unknown connections between neurons in the brainstem and other...

My lab uses genetic manipulation in mice to study the effects of Acid Sensing Ion Channels (ASICs) on behavior. Because one of these channels, ASIC1, is abundant in the amygdala complex, we tested whether it plays a role in Pavlovian fear conditioning. We found that ASIC1a knockout mice have reduced...