Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/ijms23105574
Keywords
biliverdin reductase A; obesity; type 2 diabetes; Alzheimer's disease; dementia; insulin signaling; metabolic disorders; neurodegenerative diseases
Funding
- Fondi Ateneo grant - Sapienza University [RG11916B87F55459, RM11916B811AFD26]
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The review highlights the significance of the insulin signaling pathway and the regulatory role of biliverdin reductase-A in insulin signaling, as well as its impact on cell dysfunctions in metabolic and neurodegenerative disorders.
Insulin signaling is a conserved pathway that orchestrates glucose and lipid metabolism, energy balance, and inflammation, and its dysregulation compromises the homeostasis of multiple systems. Insulin resistance is a shared hallmark of several metabolic diseases, including obesity, metabolic syndrome, and type 2 diabetes, and has been associated with cognitive decline during aging and dementia. Numerous mechanisms promoting the development of peripheral and central insulin resistance have been described, although most of them were not completely clarified. In the last decades, several studies have highlighted that biliverdin reductase-A (BVR-A), over its canonical role in the degradation of heme, acts as a regulator of insulin signaling. Evidence from human and animal studies show that BVR-A alterations are associated with the aberrant activation of insulin signaling, metabolic syndrome, liver steatosis, and visceral adipose tissue inflammation in obese and diabetic individuals. In addition, recent findings demonstrated that reduced BVR-A levels or impaired BVR-A activation contribute to the development of brain insulin resistance and metabolic alterations in Alzheimer's disease. In this narrative review, we will provide an overview on the literature by focusing on the role of BVR-A in the regulation of insulin signaling and how BVR-A alterations impact on cell dysfunctions in both metabolic and neurodegenerative disorders.
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