Obesity and diabetes are known risk factors for sarcopenia. Insulin resistance that occurs during type 2 diabetes promotes impaired synthesis of muscle protein and muscle breakdown. Juvena Therapeutics Inc. has presented data at ENDO 2025 conference for JUV-161, a novel secreted protein that induces insulin sensitization, regarding its impact on blood glucose and muscle in mice with type 2 diabetes (db/db mice).
Adrenomedullin, a hormone first identified in an adrenal medullary tumor, disrupts the effect of insulin on the endothelium of blood vessels, leading to insulin resistance linked to obesity and type 2 diabetes. The clue to this discovery lies in a molecular pathway that could be blocked to restore insulin function.
Tyrosine-protein phosphatase non-receptor type 1 (PTP1B) acts as a negative regulator of the insulin signaling pathway by dephosphorylating both the insulin receptor (IR) and the insulin receptor substrate, leading to insulin resistance, the most significant characteristic of type 2 diabetes.
Previous research has demonstrated that patients treated with the second-generation antipsychotic olanzapine (OLA) have metabolic dysfunctions and insulin resistance. Researchers from Instituto de Investigaciones Biomedicas “Alberto Sols” and collaborators investigated the impact of intraperitoneal (i.p.) OLA treatment on peripheral insulin sensitivity as well as potential effects of inhibiting the protein tyrosine phosphatase 1B (PTP1B), a negative regulator of insulin signaling.
Lysophosphatidylcholine acyltransferase 3 (LPCAT3), highly expressed in the liver, intestine, and adipose tissues, is an enzyme that preferentially incorporates polyunsaturated fatty acyl chain into lysophospholipids. Previous work showed that LPCAT3 and phospholipid remodeling play a crucial role in regulating glucose metabolism and contribute to the development of insulin resistance in type 2 diabetes.
Brain insulin signaling is known to control peripheral energy metabolism and regulation of mood and cognition. Dysregulation in this signaling has been tied to brain pathological disorders such as Alzheimer’s disease (AD). Previous findings have reported a strong connection between type 2 diabetes (T2D) and AD, suggesting insulin resistance as a potential risk factor for AD pathology and other forms of dementia.
Investigators at Washington State University (WSU) have identified a set of eight proteins that were expressed in the serum of Ursus arctos horribilis, better known as the grizzly bear, specifically during their hibernation period. In addition to reporting new basic insights into hibernation, the study, which was published in the Sept. 21, 2022, issue of iScience, could also give clues to insulin resistance and its relationship to body fat.
Communication between adipose tissue and the brain increases the risk of cognitive impairment in patients with insulin resistance through extracellular vesicles (EVs) containing microRNAs (miRNAs). Neurons could be damaged when these nucleotides reach the hippocampus guided by membrane proteins in prediabetic overweight people.
In a recent study, investigators led by Tony Tiganis at Monash University, Australia have identified that upregulation of the enzyme NOX4 (NADPH oxidase 4) boosted levels of reactive oxygen species and protected development of insulin resistance in both aged as well as obese mice.
In a recent study, investigators led by Tony Tiganis at Monash University, Australia have identified that upregulation of the enzyme NOX4 (NADPH oxidase 4) boosted levels of reactive oxygen species and protected development of insulin resistance in both aged as well as obese mice.
