G Protein-Coupled Receptor Autoantibody Expression Patterns In Adults With Decelerated Biological Aging Mirror Pediatric Profiles
Our bodies contain special proteins called G protein-coupled receptors (GPCRs) on the surface of our cells, which act like cellular antennae, receiving signals and playing a vital role in many bodily functions. Sometimes, our immune system produces antibodies, called autoantibodies (Aab), that mistakenly target and interact with these GPCRs. While the presence of these autoantibodies is known to increase with our chronological age (our actual age in years) and has been linked to chronic inflammation and autoimmune conditions in adults, their presence in children was less understood.
A recent study investigated the levels of these autoantibodies targeting 14 different GPCRs in both children and adults. The researchers considered not only chronological age but also biological age, which is a measure of how well our bodies are functioning compared to our actual age. They found that anti-GPCR autoantibodies are present throughout life, but their patterns change significantly as we age. For instance, some autoantibodies, such as those targeting ACE2, CXCR3, and BDKRB1, were found to increase in adults and older individuals. Conversely, other autoantibodies, like those against ATR1, ADRA1A, ADRB2, and ETAR, were present in higher concentrations in children.
Interestingly, the study revealed that adults who showed signs of “decelerated biological aging” – meaning their biological age was younger than their chronological age – had GPCR autoantibody profiles that closely resembled those of children. This suggests a potential link between these autoantibody patterns and the pace at which our bodies age. The researchers hypothesize that the altered autoantibody profiles seen in adults with accelerated biological aging might be a reflection of underlying systemic chronic inflammation, a process known as “inflammaging,” which is a key driver of accelerated aging. These findings highlight the complex interplay between our immune system, aging, and overall health.
Source: link to paper