Healthy Volunteers

The molecular nature of insulin resistance in human muscle is still incompletely defined. For almost thirty years we have been trying to understand the mechanisms that explain why muscle in patients who are obese or have type 2 diabetes only poorly uses fat for fuel. We termed this metabolic inflexibility. This causes fat to build up in muscle and other tissues, and causes the patient to respond poorly to insulin. We now think there are two proteins, called ANT1 and VWA8, that might be responsible for at least part of this.

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People who are obese or who have type 2 diabetes are insulin resistant. Insulin resistance is when the body does not use insulin correctly, and more insulin is needed to keep blood sugar levels normal. In this study we are trying to better understand the causes of insulin resistance.  People with insulin resistance have mitochondria that do not work well in muscle. Mitochondria are tiny parts of cells responsible for making energy, and we will be looking at these to see how they are involved in insulin resistance.

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This study will allow the University of Arizona (UA) physicians and researchers the opportunity to examine people with or without eye disease, whether the diagnosis is known or not. In this study, no treatment will be offered. Participants undergo various tests and procedures to diagnose or evaluate their eye disease.

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Are you interested in trying the Nexplanon contraceptive implant? You may qualify for a research study helping to understand how vaginal bleeding patterns change on the implant and how use of oral contraceptive pills plus the implant can make those bleeding changes more manageable. 

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This study involves the use of an light therapy device to test the effects on sleep. 

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No study has been performed to prospectively record the presenting complaints, signs, symptoms and comorbidities of children who raised the suspicion of pulmonary embolism (PE). Clinicians must extrapolate what is known about PE in adults to children. Perhaps as a result, the mortality rate of PE is the same in children as it is in adults. On the other hand, tens of thousands of low risk children and adolescents are unnecessarily exposed to increased lifetime cancer risk from ionizing radiation from CT scans done to search for PE they do not have.

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The purpose of this research study is to determine how well individualized caffeine dosing recommendations work to recover performance during continuous extended sleep loss. Results from this study will be used to help develop technology that can be deployed in the field to prevent sleep loss related declines in performance in soldiers. Work has been done to develop models that predict behavior based on previous sleep patterns, but these models have not been tested against laboratory results. This study aims to test how well one specific version of this model works.

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Carpal Tunnel Syndrome (CTS) remains an elusive, unsolved medical problem.  Current mainstream approaches address the problem at the site of symptoms, but this approach only partially accounts for the causes and effects of CTS.  Growing evidence suggests that CTS impacts not only the nervous system at the hand, but also impacts the brain.

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A team at the U of A and Banner Health is looking for people who have been diagnosed with Type 2 diabetes to join a study about a new approach to managing your blood sugar.

The study will last about 1 month and will take place at a UA/Banner Health outpatient clinic near BUMC-Tucson South. You will attend an individual education session and receive information that might help you lose weight.

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The propose of this pilot study is to test the hypothesis that children with epilepsy have changes in gut microbiome as compared to their siblings and controls.

Our specific aims are:

1. To compare the taxonomy of gut microbiome in patients with new onset epilepsy versus siblings and controls. 

2. To compare the taxonomy of gut microbiome in patients with new onset epilepsy versus chronic and refractory epilepsy. 

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