Publications by authors named "J L Jeppesen"

Background & Aims: Hepatic insulin resistance is a fundamental phenomenon observed in both Type 2 diabetes (T2D) and metabolic (dysfunction) associated fatty liver disease (MAFLD). The relative contributions of nutrients, hyperinsulinemia, hormones, inflammation, and other cues are difficult to parse as they are convoluted by interplay between the local and systemic events. Here, we used a well-established human liver microphysiological system (MPS) to establish a physiologically-relevant insulin-responsive metabolic baseline and probe how primary human hepatocytes respond to controlled perturbations in insulin, glucose, and free fatty acids (FFAs).

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Background: Leptin is a hormone which is secreted by the adipocytes. In the circulation, leptin levels are directly proportional to the body fat percentage. Studies have shown that higher leptin levels are associated with an increased risk of hypertension after adjusting for body mass index (BMI).

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Background: Medication overuse headache is a prevalent secondary headache due to the overuse of analgesics, mainly over-the-counter analgesics. Over-the-counter analgesics have been associated with disrupted male endocrinology, while the effects on female endocrinology remain nearly unknown. The aim was to understand the effect of long-term analgesic exposure in females with medication overuse headache on Anti-Müllerian hormone, a surrogate measure of female fertility.

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Article Synopsis
  • The study assessed the impact of 14 days of Low Energy Availability (LEA) versus Optimal Energy Availability (OEA) on trained female endurance athletes, focusing on their metabolism, insulin sensitivity, and exercise performance.
  • Participants followed a controlled diet with specific calorie intakes and maintained their regular training, revealing that LEA negatively impacted a 20-minute endurance performance by about 7.8% while increasing fat utilization.
  • Despite changes in fat metabolism, LEA did not significantly affect glucose control or skeletal muscle oxidative capacity, indicating a need for further research on its long-term effects on training quality and recovery.
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