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...

The Psychiatry and Early Neurobiological Development Lab (PENDL) at the University of Iowa Carver College of Medicine seeks to understand molecular and cellular aspects of early brain development and their relevance to psychiatric disorders. Hanna Stevens, the PI, is particularly interested in...

Mental illnesses such as anxiety disorder are very common but have always been challenging to study because most symptoms are subjective, qualitative, and can vary widely across different individuals. The brain is also more complex than many other organs because different regions of the brain can...

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...

The Williams Lab is interested in understanding the molecular and cellular mechanisms by which genetic risk factors contribute to psychiatric disease from a developmental perspective. Their current projects focus on voltage-gated calcium channel genes, which have been linked to the risk of...

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...