Dr. Brenda Canine

Research Interests:

Diabetes (Misfolded Insulin protein)

Alzheimer’s Disease (Misfolded Tau protein)

Mental Health in Rural America

Assistant Professor McLaughlin Research Institute Associate Course Director for Microbiology  Touro College of Osteopathic Medicine - Montana

Education 

University of Idaho, Moscow, ID; BS, Chemical Engineering, 2010

Washington State University, Pullman, WA; PhD, Pharmaceutical Sciences, 2010

McLaughlin Research Institute, Postdoctoral Fellow, 2013

We study misfolded proteins to find improved treaments for Diabetes, Neurodegeneration and Mental Health.  

-Brenda Canine

  • Misfolded Proteins

    Proteins are the catalysts of chemical reations in our cells. Often described as a lock and key mechanism, changes ot the structure of the lock or the key will result in the catalyst not working optimally. Dysfunction in protein structure is a known cause of many diseases from Cystic Fibrosis to Sickle Cell Anemia to Muscular Dystrophy. This lab studies misfolded proteins in their roles in chronic diseases associated with aging.

  • Diabetes

    Insulin is an important protein hormone that is involved in systemic glucose utilization to maintain homeostasis. In both Type 1 and Type 2 Diabetes, insulin signaling is impaired. Treatment in Type 1 involves exogenous insulin delivery through subcutaneous injection or infusion and Type 2 beings with oral medications with various mechanisms of action, however 40% of patients fail oral medication therapy and progress to requiring insulin supplementation to maintain glycemic control.

    Large boluses of insulin delivered subcutaneously can result in a condition called insulin-derived amyloidosis where the aggregated amyloid mass positively stains with anti-insulin antibodies. Additionally, during insulin infusion therapy, it has been repeatedly reported that occlusions can occur due to aggregated insulin in the pump tubing and cartridges. We strive to understand how insulin misfolding may lead to aggregation adn amyloid foramation.

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  • Neurodegeneration

    Prion diseases belong to group of progressive conditions that affect the nervous system in humans and animals. In people, prion diseases impair brain function, causing memory changes, personality changes, a decline in intellectual function (dementia), and problems with movement that worsen over time. The signs and symptoms of these conditions typically begin in adulthood, and these disorders lead to death within a few months to several years.Familial prion diseases of humans include classic Creutzfeldt-Jakob disease (CJD), Gerstmann-Sträussler-Scheinker syndrome (GSS), and Fatal Familial Insomnia (FFI). These conditions form a spectrum of diseases with overlapping signs and symptoms.

  • Mental Health

    In the last decaten Montana has consistently placed 1st, 2nd or 3rd for the most suicdes nationally. As a rural state in the shadows of the Rocky Mountains what factors contribute to this high number. Working with the Montana Department of Health and Human Services Dr. Canine, fellow faculty and studets at Touro University Collehe of Medicine in Great Falls are hopng to understand the risk factors unique to Montana.

Prion Diseases- the first group of diseases shown to be transmissible by misfolded proteins

  • What are Prion Diseases?

    Prion diseases belong to group of progressive conditions that affect the nervous system in humans and animals. In people, prion diseases impair brain function, causing memory changes, personality changes, a decline in intellectual function (dementia), and problems with movement that worsen over time. The signs and symptoms of these conditions typically begin in adulthood, and these disorders lead to death within a few months to several years.Familial prion diseases of humans include classic Creutzfeldt-Jakob disease (CJD), Gerstmann-Sträussler-Scheinker syndrome (GSS), and Fatal Familial Insomnia (FFI). These conditions form a spectrum of diseases with overlapping signs and symptoms.

  • How common are Prion Diseases?

    These disorders are very rare. They affect about one person per million worldwide each year. Approximately 300 cases occur annually in the United States.

  • What genes are related to prion diseases?

    Mutations in the PRNP gene cause prion disease. Only a small percentage of prion disease cases run in families. Most cases are sporadic, which means they occur in people without any known risk factors or gene mutations. Rarely, prion diseases can be transmitted by accidental exposure to prion-contaminated tissues during a medical procedure. This type of prion disease is called iatrogenic.One type of prion disease in humans, variant Creutzfeldt-Jakob disease (vCJD), is acquired by eating beef products obtained from cattle with prion disease. In cows, this form of the disease is known as bovine spongiform encephalopathy (BSE) or, more commonly, "mad cow" disease. Another example of an acquired human prion disease is kuru, which was identified in the South Fore tribe in Papua New Guinea. The disorder was transmitted when tribe members ate the tissue of affected people during cannibalistic funeral rituals.Familial forms of prion disease are caused by inherited mutations in the PRNP gene. This gene provides instructions for making a protein called prion protein (PrP). Normally, this protein is likely involved in transporting copper into cells. It may also play a role in protecting brain cells and helping them communicate. In familial cases of prion disease, mutations inthe PRNP gene cause cells to produce an abnormal form of the prion protein known as PrPSc. In iatrogenic and acquired cases, an affected person develops prion disease from exposure to this abnormal protein.In a process that is not fully understood, PrPSc has the ability to convert the normal prion protein, PrPC, into more PrPSc. This abnormal protein builds up in the brain, forming clumps that damage or destroy nerve cells. The loss of these cells creates microscopic sponge-like holes in the brain, which leads to the signs and symptoms of prion disease.

    Source

  • Anti-prion ASOs prolong survival in mice with prion disease

    From: Prion protein lowering is a disease-modifying therapy across prion disease stages, strains and endpoints

    Eric Vallabh Minikel et al., 2019 Nucleic Acids Research, 2020, Vol. 48, No. 19 10615–10631