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  1. Article

    Open Access

    Optogenetic stimulation of cholinergic fibers for the modulation of insulin and glycemia

    Previous studies have demonstrated stimulation of endocrine pancreas function by vagal nerve electrical stimulation. While this increases insulin secretion, expected concomitant reductions in circulating gluco...

    Arjun K. Fontaine, David G. Ramirez, Samuel F. Littich in Scientific Reports (2021)

  2. Article

    Open Access

    Contrast-enhanced ultrasound with sub-micron sized contrast agents detects insulitis in mouse models of type1 diabetes

    In type1 diabetes (T1D) autoreactive T-cells infiltrate the islets of Langerhans, depleting insulin-secreting β-cells (insulitis). Insulitis arises during an asymptomatic phase, prior to clinical diagnosis of ...

    David G. Ramirez, Eric Abenojar, Christopher Hernandez in Nature Communications (2020)

  3. Article

    Open Access

    Contrast-enhanced ultrasound measurement of pancreatic blood flow dynamics predicts type 1 diabetes progression in preclinical models

    In type 1 diabetes (T1D), immune-cell infiltration into the islets of Langerhans (insulitis) and β-cell decline occurs many years before diabetes clinically presents. Non-invasively detecting insulitis and β-c...

    Joshua R. St Clair, David Ramirez, Samantha Passman in Nature Communications (2018)